diff --git a/Sprint-2/1-key-errors/0.js b/Sprint-2/1-key-errors/0.js
index 653d6f5a0..327ff778e 100644
--- a/Sprint-2/1-key-errors/0.js
+++ b/Sprint-2/1-key-errors/0.js
@@ -2,12 +2,28 @@
 //  =============> write your prediction here
 
 // call the function capitalise with a string input
+
 // interpret the error message and figure out why an error is occurring
 
 function capitalise(str) {
-  let str = `${str[0].toUpperCase()}${str.slice(1)}`;
-  return str;
+  let outputStr = `${str[0].toUpperCase()}${str.slice(1)}`;
+  console.log(outputStr);
+  return outputStr;
 }
+capitalise("edak");
 
 // =============> write your explanation here
+
+//expecting the function to return the  characters of the string, with the first character capitalized.
+
+//syntaxError: Identifier 'str' has already been declared.
+// The variable str  has already been passed as parameter in the function (), declaring it again cause an identity error
+
 // =============> write your new code here
+
+// function capitalise(str) {
+// let outputStr = `${str[0].toUpperCase()}${str.slice(1)}`;
+// console.log(outputStr);
+// return outputStr;
+//};
+//capitalise('edak')
diff --git a/Sprint-2/1-key-errors/1.js b/Sprint-2/1-key-errors/1.js
index f2d56151f..68ee312e4 100644
--- a/Sprint-2/1-key-errors/1.js
+++ b/Sprint-2/1-key-errors/1.js
@@ -1,8 +1,10 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
 
+// =============> write your prediction here
+// decimalNumber is supplied as a function parameter and and also declared as a variable,
+// it will throw an identifier syntaxError.
 // Try playing computer with the example to work out what is going on
 
 function convertToPercentage(decimalNumber) {
@@ -15,6 +17,15 @@ function convertToPercentage(decimalNumber) {
 console.log(decimalNumber);
 
 // =============> write your explanation here
-
+// playing computer with the first code throw syntaxError: decimalNumber has been already declared.
 // Finally, correct the code to fix the problem
+
 // =============> write your new code here
+
+function convertToPercentage(decimalNumber) {
+  // const decimalNumber = 0.5;
+  const percentage = `${decimalNumber * 100}%`;
+  return percentage;
+}
+
+console.log(convertToPercentage(0.5));
diff --git a/Sprint-2/1-key-errors/2.js b/Sprint-2/1-key-errors/2.js
index aad57f7cf..66883626d 100644
--- a/Sprint-2/1-key-errors/2.js
+++ b/Sprint-2/1-key-errors/2.js
@@ -1,20 +1,28 @@
 
 // Predict and explain first BEFORE you run any code...
+//This code is to take one number function parameter and return  area.
 
 // this function should square any number but instead we're going to get an error
 
-// =============> write your prediction of the error here
+// =============> write your prediction of the error here.
+// syntaxError: passing an argument instead for a parameter.
 
 function square(3) {
     return num * num;
 }
 
 // =============> write the error message here
+//SyntaxError:Unexpected number
 
 // =============> explain this error message here
+//The function was not expecting number during declaration
 
 // Finally, correct the code to fix the problem
 
-// =============> write your new code here
 
+// =============> write your new code here
 
+//function square(num) {
+ //   return num * num;
+//}
+//console.log(square(3))
\ No newline at end of file
diff --git a/Sprint-2/2-mandatory-debug/0.js b/Sprint-2/2-mandatory-debug/0.js
index b27511b41..70d55f12e 100644
--- a/Sprint-2/2-mandatory-debug/0.js
+++ b/Sprint-2/2-mandatory-debug/0.js
@@ -1,6 +1,7 @@
 // Predict and explain first...
 
 // =============> write your prediction here
+// multiply function is to return the product of a and b
 
 function multiply(a, b) {
   console.log(a * b);
@@ -9,6 +10,14 @@ function multiply(a, b) {
 console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
 // =============> write your explanation here
+//The logic for multiplication is in the console.log() function which main purpose is to log it to the console.
 
 // Finally, correct the code to fix the problem
+
 //  =============> 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)}`);
diff --git a/Sprint-2/2-mandatory-debug/1.js b/Sprint-2/2-mandatory-debug/1.js
index 37cedfbcf..f71a98c7c 100644
--- a/Sprint-2/2-mandatory-debug/1.js
+++ b/Sprint-2/2-mandatory-debug/1.js
@@ -1,5 +1,6 @@
 // Predict and explain first...
 //  =============> write your prediction here
+// This function is to return the sum of a and b
 
 function sum(a, b) {
   return;
@@ -9,5 +10,13 @@ function sum(a, b) {
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
 // =============> write your explanation here
+// the function above throw error because it is terminated by the return statement even before it gets to the operation
 // 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 57d3f5dc3..e312cbff4 100644
--- a/Sprint-2/2-mandatory-debug/2.js
+++ b/Sprint-2/2-mandatory-debug/2.js
@@ -2,6 +2,7 @@
 
 // Predict the output of the following code:
 // =============> Write your prediction here
+//This code convert number to string and make a copy of the last character using the reverse indexing
 
 const num = 103;
 
@@ -15,10 +16,23 @@ console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 
 // Now run the code and compare the output to your prediction
 // =============> 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
+//The output is the way it is because the variable was declared as a fixed global variable and not as a function parameter
 // Finally, correct the code to fix the problem
 // =============> write your new code here
 
+//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
diff --git a/Sprint-2/3-mandatory-implement/1-bmi.js b/Sprint-2/3-mandatory-implement/1-bmi.js
index 17b1cbde1..c05370060 100644
--- a/Sprint-2/3-mandatory-implement/1-bmi.js
+++ b/Sprint-2/3-mandatory-implement/1-bmi.js
@@ -15,5 +15,8 @@
 // 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
+  // return the BMI of someone based off their weight and height
+  const bmi = weight / height ** 2;
+  return Math.round(bmi * 10) / 10;
+}
+console.log(calculateBMI(70, 1.75));
diff --git a/Sprint-2/3-mandatory-implement/2-cases.js b/Sprint-2/3-mandatory-implement/2-cases.js
index 5b0ef77ad..fa8cddfc8 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 snakeCasing(str) {
+  const capitalize = str.toUpperCase();
+
+  const arr = capitalize.split(" ");
+  return arr.join("_");
+}
+
+console.log(snakeCasing("ofonime edak"));
diff --git a/Sprint-2/3-mandatory-implement/3-to-pounds.js b/Sprint-2/3-mandatory-implement/3-to-pounds.js
index 6265a1a70..c8bff581e 100644
--- a/Sprint-2/3-mandatory-implement/3-to-pounds.js
+++ b/Sprint-2/3-mandatory-implement/3-to-pounds.js
@@ -4,3 +4,24 @@
 // 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
+  );
+  const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+  const pounds = paddedPenceNumberString.substring(
+    0,
+    paddedPenceNumberString.length - 2
+  );
+
+  const pence = paddedPenceNumberString
+    .substring(paddedPenceNumberString.length - 2)
+    .padEnd(2, "0");
+
+  return `£${pounds}.${pence}`;
+}
+console.log(toPounds("399p"));
+console.log(toPounds("50p"));
+console.log(toPounds("030p"));
diff --git a/Sprint-2/4-mandatory-interpret/time-format.js b/Sprint-2/4-mandatory-interpret/time-format.js
index 7c98eb0e8..c03a4d1b8 100644
--- a/Sprint-2/4-mandatory-interpret/time-format.js
+++ b/Sprint-2/4-mandatory-interpret/time-format.js
@@ -18,17 +18,20 @@ function formatTimeDisplay(seconds) {
 
 // a) When formatTimeDisplay is called how many times will pad be called?
 // =============> write your answer here
-
+// Pad is called once.
 // 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
-
+ // value of num=undefined
 // c) What is the return value of pad is called for the first time?
 // =============> write your answer here
+// it returns a function object
 
 // 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
+//value is 0
+//the frame side when pad is called the last time num is assigned a value of 0
 
 // e) What is the return value assigned to num when pad is called for the last time in this program?  Explain your answer
 // =============> write your answer here
diff --git a/Sprint-2/5-stretch-extend/format-time.js b/Sprint-2/5-stretch-extend/format-time.js
index 32a32e66b..2dbc99acf 100644
--- a/Sprint-2/5-stretch-extend/format-time.js
+++ b/Sprint-2/5-stretch-extend/format-time.js
@@ -10,16 +10,25 @@ function formatAs12HourClock(time) {
   return `${time} am`;
 }
 
+//Test cases
 const currentOutput = formatAs12HourClock("08:00");
 const targetOutput = "08:00 am";
-console.assert(
-  currentOutput === targetOutput,
-  `current output: ${currentOutput}, target output: ${targetOutput}`
-);
+console.assert(currentOutput === targetOutput, `current output: ${currentOutput}, target output: ${targetOutput}`);
 
 const currentOutput2 = formatAs12HourClock("23:00");
 const targetOutput2 = "11:00 pm";
-console.assert(
-  currentOutput2 === targetOutput2,
-  `current output: ${currentOutput2}, target output: ${targetOutput2}`
-);
+console.assert(currentOutput2 === targetOutput2,`current output: ${currentOutput2}, target output: ${targetOutput2}`);
+
+
+const currentOutput3 = formatAs12HourClock("00:00");
+const targetOutput3 = "12:00 am";
+console.assert(currentOutput3 === targetOutput3,`current output: ${currentOutput3}, target output: ${targetOutput3}`);
+
+
+const currentOutput4= formatAs12HourClock("00:00");
+const targetOutput4= "12:00 am";
+console.assert(currentOutput4 === targetOutput4,`current output: ${currentOutput4}, target output: ${targetOutput4}`);
+
+const currentOutput5= formatAs12HourClock("15:01");
+const targetOutput5= "3:01 pm";
+console.assert(currentOutput5 === targetOutput5,`current output: ${currentOutput5}, target output: ${targetOutput5}`);