diff --git a/Sprint-1/1-key-exercises/1-count.js b/Sprint-1/1-key-exercises/1-count.js
deleted file mode 100644
index 117bcb2b6e..0000000000
--- a/Sprint-1/1-key-exercises/1-count.js
+++ /dev/null
@@ -1,6 +0,0 @@
-let count = 0;
-
-count = count + 1;
-
-// Line 1 is a variable declaration, creating the count variable with an initial value of 0
-// Describe what line 3 is doing, in particular focus on what = is doing
diff --git a/Sprint-1/1-key-exercises/2-initials.js b/Sprint-1/1-key-exercises/2-initials.js
deleted file mode 100644
index 47561f6175..0000000000
--- a/Sprint-1/1-key-exercises/2-initials.js
+++ /dev/null
@@ -1,11 +0,0 @@
-let firstName = "Creola";
-let middleName = "Katherine";
-let lastName = "Johnson";
-
-// Declare a variable called initials that stores the first character of each string.
-// This should produce the string "CKJ", but you must not write the characters C, K, or J in the code of your solution.
-
-let initials = ``;
-
-// https://www.google.com/search?q=get+first+character+of+string+mdn
-
diff --git a/Sprint-1/1-key-exercises/3-paths.js b/Sprint-1/1-key-exercises/3-paths.js
deleted file mode 100644
index ab90ebb28e..0000000000
--- a/Sprint-1/1-key-exercises/3-paths.js
+++ /dev/null
@@ -1,23 +0,0 @@
-// The diagram below shows the different names for parts of a file path on a Unix operating system
-
-// ┌─────────────────────┬────────────┐
-// │          dir        │    base    │
-// ├──────┬              ├──────┬─────┤
-// │ root │              │ name │ ext │
-// "  /    home/user/dir / file  .txt "
-// └──────┴──────────────┴──────┴─────┘
-
-// (All spaces in the "" line should be ignored. They are purely for formatting.)
-
-const filePath = "/Users/mitch/cyf/Module-JS1/week-1/interpret/file.txt";
-const lastSlashIndex = filePath.lastIndexOf("/");
-const base = filePath.slice(lastSlashIndex + 1);
-console.log(`The base part of ${filePath} is ${base}`);
-
-// Create a variable to store the dir part of the filePath variable
-// Create a variable to store the ext part of the variable
-
-const dir = ;
-const ext = ;
-
-// https://www.google.com/search?q=slice+mdn
\ No newline at end of file
diff --git a/Sprint-1/1-key-exercises/4-random.js b/Sprint-1/1-key-exercises/4-random.js
deleted file mode 100644
index 292f83aabb..0000000000
--- a/Sprint-1/1-key-exercises/4-random.js
+++ /dev/null
@@ -1,9 +0,0 @@
-const minimum = 1;
-const maximum = 100;
-
-const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
-
-// In this exercise, you will need to work out what num represents?
-// Try breaking down the expression and using documentation to explain what it means
-// It will help to think about the order in which expressions are evaluated
-// Try logging the value of num and running the program several times to build an idea of what the program is doing
diff --git a/Sprint-1/2-mandatory-errors/0.js b/Sprint-1/2-mandatory-errors/0.js
deleted file mode 100644
index cf6c5039f7..0000000000
--- a/Sprint-1/2-mandatory-errors/0.js
+++ /dev/null
@@ -1,2 +0,0 @@
-This is just an instruction for the first activity - but it is just for human consumption
-We don't want the computer to run these 2 lines - how can we solve this problem?
\ No newline at end of file
diff --git a/Sprint-1/2-mandatory-errors/1.js b/Sprint-1/2-mandatory-errors/1.js
deleted file mode 100644
index 7a43cbea76..0000000000
--- a/Sprint-1/2-mandatory-errors/1.js
+++ /dev/null
@@ -1,4 +0,0 @@
-// trying to create an age variable and then reassign the value by 1
-
-const age = 33;
-age = age + 1;
diff --git a/Sprint-1/2-mandatory-errors/2.js b/Sprint-1/2-mandatory-errors/2.js
deleted file mode 100644
index e09b89831d..0000000000
--- a/Sprint-1/2-mandatory-errors/2.js
+++ /dev/null
@@ -1,5 +0,0 @@
-// Currently trying to print the string "I was born in Bolton" but it isn't working...
-// what's the error ?
-
-console.log(`I was born in ${cityOfBirth}`);
-const cityOfBirth = "Bolton";
diff --git a/Sprint-1/2-mandatory-errors/3.js b/Sprint-1/2-mandatory-errors/3.js
deleted file mode 100644
index ec101884db..0000000000
--- a/Sprint-1/2-mandatory-errors/3.js
+++ /dev/null
@@ -1,9 +0,0 @@
-const cardNumber = 4533787178994213;
-const last4Digits = cardNumber.slice(-4);
-
-// The last4Digits variable should store the last 4 digits of cardNumber
-// However, the code isn't working
-// Before running the code, make and explain a prediction about why the code won't work
-// Then run the code and see what error it gives.
-// Consider: Why does it give this error? Is this what I predicted? If not, what's different?
-// Then try updating the expression last4Digits is assigned to, in order to get the correct value
diff --git a/Sprint-1/2-mandatory-errors/4.js b/Sprint-1/2-mandatory-errors/4.js
deleted file mode 100644
index 5f86c730bc..0000000000
--- a/Sprint-1/2-mandatory-errors/4.js
+++ /dev/null
@@ -1,2 +0,0 @@
-const 12HourClockTime = "8:53pm";
-const 24hourClockTime = "20:53";
diff --git a/Sprint-1/3-mandatory-interpret/1-percentage-change.js b/Sprint-1/3-mandatory-interpret/1-percentage-change.js
deleted file mode 100644
index e24ecb8e18..0000000000
--- a/Sprint-1/3-mandatory-interpret/1-percentage-change.js
+++ /dev/null
@@ -1,22 +0,0 @@
-let carPrice = "10,000";
-let priceAfterOneYear = "8,543";
-
-carPrice = Number(carPrice.replaceAll(",", ""));
-priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
-
-const priceDifference = carPrice - priceAfterOneYear;
-const percentageChange = (priceDifference / carPrice) * 100;
-
-console.log(`The percentage change is ${percentageChange}`);
-
-// Read the code and then answer the questions below
-
-// a) How many function calls are there in this file? Write down all the lines where a function call is made
-
-// b) Run the code and identify the line where the error is coming from - why is this error occurring? How can you fix this problem?
-
-// c) Identify all the lines that are variable reassignment statements
-
-// d) Identify all the lines that are variable declarations
-
-// e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
diff --git a/Sprint-1/3-mandatory-interpret/2-time-format.js b/Sprint-1/3-mandatory-interpret/2-time-format.js
deleted file mode 100644
index 47d2395587..0000000000
--- a/Sprint-1/3-mandatory-interpret/2-time-format.js
+++ /dev/null
@@ -1,25 +0,0 @@
-const movieLength = 8784; // length of movie in seconds
-
-const remainingSeconds = movieLength % 60;
-const totalMinutes = (movieLength - remainingSeconds) / 60;
-
-const remainingMinutes = totalMinutes % 60;
-const totalHours = (totalMinutes - remainingMinutes) / 60;
-
-const result = `${totalHours}:${remainingMinutes}:${remainingSeconds}`;
-console.log(result);
-
-// For the piece of code above, read the code and then answer the following questions
-
-// a) How many variable declarations are there in this program?
-
-// b) How many function calls are there?
-
-// c) Using documentation, explain what the expression movieLength % 60 represents
-// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
-
-// d) Interpret line 4, what does the expression assigned to totalMinutes mean?
-
-// e) What do you think the variable result represents? Can you think of a better name for this variable?
-
-// f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
diff --git a/Sprint-1/3-mandatory-interpret/3-to-pounds.js b/Sprint-1/3-mandatory-interpret/3-to-pounds.js
deleted file mode 100644
index 60c9ace69a..0000000000
--- a/Sprint-1/3-mandatory-interpret/3-to-pounds.js
+++ /dev/null
@@ -1,27 +0,0 @@
-const penceString = "399p";
-
-const penceStringWithoutTrailingP = penceString.substring(
-  0,
-  penceString.length - 1
-);
-
-const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
-const pounds = paddedPenceNumberString.substring(
-  0,
-  paddedPenceNumberString.length - 2
-);
-
-const pence = paddedPenceNumberString
-  .substring(paddedPenceNumberString.length - 2)
-  .padEnd(2, "0");
-
-console.log(`£${pounds}.${pence}`);
-
-// This program takes a string representing a price in pence
-// The program then builds up a string representing the price in pounds
-
-// You need to do a step-by-step breakdown of each line in this program
-// Try and describe the purpose / rationale behind each step
-
-// To begin, we can start with
-// 1. const penceString = "399p": initialises a string variable with the value "399p"
diff --git a/Sprint-1/4-stretch-explore/chrome.md b/Sprint-1/4-stretch-explore/chrome.md
deleted file mode 100644
index e7dd5feafe..0000000000
--- a/Sprint-1/4-stretch-explore/chrome.md
+++ /dev/null
@@ -1,18 +0,0 @@
-Open a new window in Chrome,
-
-then locate the **Console** tab.
-
-Voila! You now have access to the [Chrome V8 Engine](https://www.cloudflare.com/en-gb/learning/serverless/glossary/what-is-chrome-v8/).
-Just like the Node REPL, you can input JavaScript code into the Console tab and the V8 engine will execute it.
-
-Let's try an example.
-
-In the Chrome console,
-invoke the function `alert` with an input string of `"Hello world!"`;
-
-What effect does calling the `alert` function have?
-
-Now try invoking the function `prompt` with a string input of `"What is your name?"` - store the return value of your call to `prompt` in an variable called `myName`.
-
-What effect does calling the `prompt` function have?
-What is the return value of `prompt`?
diff --git a/Sprint-1/4-stretch-explore/objects.md b/Sprint-1/4-stretch-explore/objects.md
deleted file mode 100644
index 0216dee56a..0000000000
--- a/Sprint-1/4-stretch-explore/objects.md
+++ /dev/null
@@ -1,16 +0,0 @@
-## Objects
-
-In this activity, we'll explore some additional concepts that you'll encounter in more depth later on in the course.
-
-Open the Chrome devtools Console, type in `console.log` and then hit enter
-
-What output do you get?
-
-Now enter just `console` in the Console, what output do you get back?
-
-Try also entering `typeof console`
-
-Answer the following questions:
-
-What does `console` store?
-What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean?
diff --git a/Sprint-2/1-key-errors/0.js b/Sprint-2/1-key-errors/0.js
index 653d6f5a07..1e1eff1496 100644
--- a/Sprint-2/1-key-errors/0.js
+++ b/Sprint-2/1-key-errors/0.js
@@ -1,7 +1,9 @@
 // Predict and explain first...
 //  =============> write your prediction here
-
-// call the function capitalise with a string input
+// Well, I think the variable "str" is being declared twice, so the code will
+//  through an error message.
+//
+//call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
 
 function capitalise(str) {
@@ -10,4 +12,12 @@ function capitalise(str) {
 }
 
 // =============> write your explanation here
+//The variable "str" has been used as a parameter for the capitalise function
+//and also been declared again inside the function. I think if "let" is removed
+//the code will work.
 // =============> write your new code here
+function capitalise(str) {
+  str = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return str;
+}
+console.log(capitalise("sorted"));
diff --git a/Sprint-2/1-key-errors/1.js b/Sprint-2/1-key-errors/1.js
index f2d56151f4..fc17d83e49 100644
--- a/Sprint-2/1-key-errors/1.js
+++ b/Sprint-2/1-key-errors/1.js
@@ -1,20 +1,40 @@
 // Predict and explain first...
-
 // Why will an error occur when this program runs?
 // =============> write your prediction here
-
+// I think there will be an error as "decimalNumber" variable has already been declared as a parameter in
+// "convertToPercentage" function
+// 
 // Try playing computer with the example to work out what is going on
 
-function convertToPercentage(decimalNumber) {
+/*function convertToPercentage(decimalNumber) {
   const decimalNumber = 0.5;
   const percentage = `${decimalNumber * 100}%`;
 
   return percentage;
 }
 
-console.log(decimalNumber);
+console.log(decimalNumber); */
 
 // =============> write your explanation here
+// =============Explanation ===============
+// the "decimalNumber" variable is a local variable and can only be seen inside "convertToPercentage" function
+// therefore when called outside the function it triggers "ReferenceError"
 
 // Finally, correct the code to fix the problem
+// =========correction=========
+// problem can be fixed by moving the variable declaration outside the function
+//  and making it global
+
 // =============> write your new code here
+
+const decimalNumber = 0.5;
+function convertToPercentage(decimalNumber) {
+  const percentage = `${decimalNumber * 100}%`;
+
+  return percentage;
+}
+
+console.log(decimalNumber);
+console.log(convertToPercentage(decimalNumber));
+
+
diff --git a/Sprint-2/1-key-errors/2.js b/Sprint-2/1-key-errors/2.js
index aad57f7cfe..91375fcf8f 100644
--- a/Sprint-2/1-key-errors/2.js
+++ b/Sprint-2/1-key-errors/2.js
@@ -1,20 +1,24 @@
-
 // Predict and explain first BEFORE you run any code...
 
 // this function should square any number but instead we're going to get an error
 
 // =============> write your prediction of the error here
-
-function square(3) {
+//=========Prediction=============
+// I think there will not be en error till we call the function.
+/*function square(num) {
     return num * num;
 }
-
+console.log(square(5))*/
 // =============> write the error message here
-
+// Unexpected number
 // =============> explain this error message here
-
+// I think it function expects parameter as a variable rather than  a number.
 // Finally, correct the code to fix the problem
-
+// ===========correction=========
+// to correct the code we need to introduce parameter as a variable, rather than a number.
+// that way any number can be passed when function is called.
 // =============> write your new code here
-
-
+function square(num) {
+  return num * num;
+}
+console.log(square(5));
diff --git a/Sprint-2/2-mandatory-debug/0.js b/Sprint-2/2-mandatory-debug/0.js
index b27511b417..1ba0b3fa69 100644
--- a/Sprint-2/2-mandatory-debug/0.js
+++ b/Sprint-2/2-mandatory-debug/0.js
@@ -1,14 +1,25 @@
 // Predict and explain first...
 
 // =============> write your prediction here
-
-function multiply(a, b) {
+//===========Prediction=======
+// I think the code will not produce the desired result as the function is not returning any value
+/*function multiply(a, b) {
   console.log(a * b);
 }
-
 console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
+console.log(multiply(3, 5));
+typeof(multiply(3, 4));*/
 
 // =============> write your explanation here
-
+//===============Explanation=========
+// The function itself prints out the result, but the result has no (type) as such and can not be used as
+// a data type. 
+//
 // Finally, correct the code to fix the problem
+//============correction============
+// To correct the code "return" needs to be introduced.
 //  =============> write your new code here
+function multiply(a, b) {
+  return (a * b);
+}
+console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
\ No newline at end of file
diff --git a/Sprint-2/2-mandatory-debug/1.js b/Sprint-2/2-mandatory-debug/1.js
index 37cedfbcfd..b004510d9c 100644
--- a/Sprint-2/2-mandatory-debug/1.js
+++ b/Sprint-2/2-mandatory-debug/1.js
@@ -1,13 +1,23 @@
 // Predict and explain first...
 //  =============> write your prediction here
-
+// =============explanation==========
+// I think will either give error, or no result at all as there is  a ";" semicolon after
+//  the return statement and the actual calculation is not assigned to anything.
 function sum(a, b) {
   return;
-  a + b;
+   a + b;
 }
 
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
 // =============> write your explanation here
+//==============Explanation===============
+//To fix the code the ";" must be removed, and the calculation 
+//needs to be placed next to the "return"
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+function sum(a, b) {
+  return a + b;
+}
+
+console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
diff --git a/Sprint-2/2-mandatory-debug/2.js b/Sprint-2/2-mandatory-debug/2.js
index 57d3f5dc35..db1975ec80 100644
--- a/Sprint-2/2-mandatory-debug/2.js
+++ b/Sprint-2/2-mandatory-debug/2.js
@@ -2,6 +2,9 @@
 
 // Predict the output of the following code:
 // =============> Write your prediction here
+//============Prediction========
+// I think the code output will be  "3" in al three cases as "num variable is declared outside the function and 
+// not used as a parameter for the function"
 
 const num = 103;
 
@@ -14,11 +17,30 @@ console.log(`The last digit of 105 is ${getLastDigit(105)}`);
 console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 
 // Now run the code and compare the output to your prediction
+// prediction matched
 // =============> write the output here
+/*The last digit of 42 is 3
+The last digit of 105 is 3
+The last digit of 806 is 3*/
 // Explain why the output is the way it is
 // =============> write your explanation here
+//===============Explanation===========
+// The variable is not used as a parameter of the function, and therefore
+//  is ignored when passed inside function call.
 // Finally, correct the code to fix the problem
+//
 // =============> write your new code here
+//const num = 103;
 
+function getLastDigit(num) {
+  return num.toString().slice(-1);
+}
+
+console.log(`The last digit of 42 is ${getLastDigit(42)}`);
+console.log(`The last digit of 105 is ${getLastDigit(105)}`);
+console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 // This program should tell the user the last digit of each number.
 // Explain why getLastDigit is not working properly - correct the problem
+// =============explanation==================
+// The variable is not used as a parameter of the function, and therefore
+//  is ignored when passed inside function call.
diff --git a/Sprint-2/3-mandatory-implement/1-bmi.js b/Sprint-2/3-mandatory-implement/1-bmi.js
index 17b1cbde1b..e0ea51ef82 100644
--- a/Sprint-2/3-mandatory-implement/1-bmi.js
+++ b/Sprint-2/3-mandatory-implement/1-bmi.js
@@ -13,7 +13,10 @@
 // Given someone's weight in kg and height in metres
 // Then when we call this function with the weight and height
 // It should return their Body Mass Index to 1 decimal place
-
+//
 function calculateBMI(weight, height) {
-    // return the BMI of someone based off their weight and height
-}
\ No newline at end of file
+    let bmi = weight / (height **2 )// weight divided by height squared.
+    return  `Your Body Mass Index is ${bmi.toFixed(1)} units`// toFixed(1) insures that result is displayed 
+    // with 1 decimal point
+}
+console.log(calculateBMI(87, 1.86))
\ No newline at end of file
diff --git a/Sprint-2/3-mandatory-implement/2-cases.js b/Sprint-2/3-mandatory-implement/2-cases.js
index 5b0ef77ad9..60c323d90c 100644
--- a/Sprint-2/3-mandatory-implement/2-cases.js
+++ b/Sprint-2/3-mandatory-implement/2-cases.js
@@ -14,3 +14,11 @@
 // You will need to come up with an appropriate name for the function
 // Use the MDN string documentation to help you find a solution
 // This might help https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/toUpperCase
+//
+function upper_snake_case(word) {
+    let new_word = word.toUpperCase();// capitalises string
+    let split_word = new_word.split(" ");// turns string into array in order to to use "join()" method
+    let joined_word = split_word.join("_")// joins strings with "_" to make it UPPER_SNAKE
+    return joined_word; 
+}
+console.log(upper_snake_case("hello there"));
diff --git a/Sprint-2/3-mandatory-implement/3-to-pounds.js b/Sprint-2/3-mandatory-implement/3-to-pounds.js
index 6265a1a703..766e686374 100644
--- a/Sprint-2/3-mandatory-implement/3-to-pounds.js
+++ b/Sprint-2/3-mandatory-implement/3-to-pounds.js
@@ -4,3 +4,37 @@
 // You will need to declare a function called toPounds with an appropriately named parameter.
 
 // You should call this function a number of times to check it works for different inputs
+function toPounds(penceString) {
+  const penceStringWithoutTrailingP = penceString.substring(
+    0,
+    penceString.length - 1
+  ); //variable
+  //  "penceStringWithoutTrailingP" declared and assigned first three characters
+  //  of "penceString" using the substring method, removing the trailing "p".
+
+  const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+  // variable "paddedPenceNumberString" declared and assigned the value of "penceStringWithoutTrailingP"
+  // padded to a minimum length of 3 characters with leading zeros using the padStart method. Which is clever way,
+  // really to replace it with zeros if number of pence is less than 3 characters long.
+
+  const pounds = paddedPenceNumberString.substring(
+    0,
+    paddedPenceNumberString.length - 2
+  );
+  //Variable "pounds" declared and assigned value of "paddedPenceNumberString" but without the last
+  // two characters.
+
+  const pence = paddedPenceNumberString
+    .substring(paddedPenceNumberString.length - 2)
+    .padEnd(2, "0");
+  // Variable "pence" declared and assigned value of the last two characters of "paddedPenceNumberString"
+  // and padded to a minimum length of 2 characters with zeros at the end, padEnd method is used once again.
+  // it is to ensure that if the number of pence is less than 2 characters long, it will be padded with zeros
+  // at the end.
+
+  return `£${pounds}.${pence}`;
+  // Finally equivalent in "pounds" and "pence" is returned
+}
+console.log(toPounds("2345")); // testing with normal string of numbers
+console.log(toPounds("-2345")); // testing with string of negative numbers
+console.log(toPounds("0")); // testing with zero
diff --git a/Sprint-2/4-mandatory-interpret/time-format.js b/Sprint-2/4-mandatory-interpret/time-format.js
index 17127bc01e..bad1313dc3 100644
--- a/Sprint-2/4-mandatory-interpret/time-format.js
+++ b/Sprint-2/4-mandatory-interpret/time-format.js
@@ -14,6 +14,7 @@ function formatTimeDisplay(seconds) {
 
   return `${pad(totalHours)}:${pad(remainingMinutes)}:${pad(remainingSeconds)}`;
 }
+console.log(formatTimeDisplay(61))
 
 // You will need to play computer with this example - use the Python Visualiser https://pythontutor.com/visualize.html#mode=edit
 // to help you answer these questions
@@ -22,17 +23,26 @@ function formatTimeDisplay(seconds) {
 
 // a) When formatTimeDisplay is called how many times will pad be called?
 // =============> write your answer here
+// Answer to a) : when "formatTimeDisplay" is called "pad" is called 3 times
 
 // Call formatTimeDisplay with an input of 61, now answer the following:
 
 // b) What is the value assigned to num when pad is called for the first time?
 // =============> write your answer here
+// Answer to b) : value assigned to num when pad is called for the first time is 0 - zero
 
 // c) What is the return value of pad is called for the first time?
 // =============> write your answer here
+// Answer to c) : the return value on pad is the "numString" variable, which is string "00"
 
 // d) What is the value assigned to num when pad is called for the last time in this program?  Explain your answer
 // =============> write your answer here
+// Answer to d) : Value assigned to "num" the last time "pad" is called is 1, one.
+// "num" in this case is a variable "remainingSeconds", which is a remainder of "seconds" (61)
+//  variable divided by 60, which is 1.
 
 // e) What is the return value of pad when it is called for the last time in this program?  Explain your answer
 // =============> write your answer here
+// Answer to e) : The return value of "pad" the last time pad called is the variable "numString"
+// which is - string "01". "toString" variable is a "num" converted to a string earlier in the function 
+// and makes it double digit string.
diff --git a/Sprint-2/5-stretch-extend/format-time.js b/Sprint-2/5-stretch-extend/format-time.js
index 32a32e66b8..f26699638d 100644
--- a/Sprint-2/5-stretch-extend/format-time.js
+++ b/Sprint-2/5-stretch-extend/format-time.js
@@ -1,15 +1,19 @@
 // This is the latest solution to the problem from the prep.
 // Make sure to do the prep before you do the coursework
-// Your task is to write tests for as many different groups of input data or edge cases as you can, and fix any bugs you find.
+// Your task is to write tests for as many different groups of input data or edge cases as you can, and fix any
+// bugs you find.
 
 function formatAs12HourClock(time) {
-  const hours = Number(time.slice(0, 2));
-  if (hours > 12) {
-    return `${hours - 12}:00 pm`;
-  }
+    if (Number(time.slice(0, 2)) === 12) {
+        return `${time} pm` // if time is "12:00" it will show 
+        //12:00 pm
+    } else if (Number(time.slice(0, 2))=== 24) {
+        return `00:00 am`;
+    } else if (Number(time.slice(0, 2)) > 12) {
+        return `${Number(time.slice(0, 2)) - 12}:00 pm`;
+    }
   return `${time} am`;
 }
-
 const currentOutput = formatAs12HourClock("08:00");
 const targetOutput = "08:00 am";
 console.assert(
@@ -23,3 +27,24 @@ console.assert(
   currentOutput2 === targetOutput2,
   `current output: ${currentOutput2}, target output: ${targetOutput2}`
 );
+const currentOutput3 = formatAs12HourClock("00:00");// 
+const targetOutput3 = "00:00 am";// expecting new test to return "00:00 am"
+console.assert(
+  currentOutput3 === targetOutput3, 
+  `current output: ${currentOutput3}, target output: ${targetOutput3}`
+); // if currentOutput3 and targetOutput3 do not match, the assertion message will be given.
+
+const currentOutput4 = formatAs12HourClock("12:00");//
+const targetOutput4 = "12:00 pm"; // expected output for "12:00" is "12:00 pm"
+console.assert(
+  currentOutput4 === targetOutput4,
+  `current output: ${currentOutput4}, target output: ${targetOutput4}`
+);// if currentOutput and targetOutput do not match, the assertion message will be given.
+const currentOutput5 = formatAs12HourClock("24:00");
+const targetOutput5 = "00:00 am";
+console.assert(
+    currentOutput5 === targetOutput5,
+    `current output5: ${currentOutput5}, target output5: ${targetOutput5}`
+  ); // if 24:00 is entered and the output is not "00:00 am" the assertion message will be given
+
+