diff --git a/1-exercises/A-array-find/exercise.js b/1-exercises/A-array-find/exercise.js
index 35902fed..998e16a2 100644
--- a/1-exercises/A-array-find/exercise.js
+++ b/1-exercises/A-array-find/exercise.js
@@ -16,10 +16,16 @@ let names = [
   "Karim",
   "Ahmed",
 ];
-
+/*
 let longNameThatStartsWithA = findLongNameThatStartsWithA(names);
 
 console.log(longNameThatStartsWithA);
 
+const found = names.find(element => element[0] === "A" );*/
+
+
+
+const found = names.find(element => element[0] === "A" && element.length > 7 );
+
 /* EXPECTED OUTPUT */
 // "Alexandra"
diff --git a/1-exercises/B-array-some/exercise.js b/1-exercises/B-array-some/exercise.js
index fddc69ee..cb64524e 100644
--- a/1-exercises/B-array-some/exercise.js
+++ b/1-exercises/B-array-some/exercise.js
@@ -6,6 +6,12 @@
   - Do not edit any of the existing code
 */
 
+for (const pair of pairsByIndex) {
+  if (!pair) {
+    process.exit(1);
+  }
+}
+
 let pairsByIndex = [[0, 3], [1, 2], [2, 1], null, [3, 0]];
 
 // If there is a null value in the array exit the program with the error code
diff --git a/1-exercises/C-array-every/exercise.js b/1-exercises/C-array-every/exercise.js
index 347b9632..f36c336f 100644
--- a/1-exercises/C-array-every/exercise.js
+++ b/1-exercises/C-array-every/exercise.js
@@ -5,7 +5,13 @@
 let students = ["Omar", "Austine", "Dany", "Swathi", "Lesley", "Rukmini"];
 let group = ["Austine", "Dany", "Swathi", "Daniel"];
 
-let groupIsOnlyStudents; // complete this statement
+let groupIsOnlyStudents = function () {
+  for (let i = 0; i < students.length; i++) {
+    if (!group.includes(student[i])) {
+      return true;
+    }
+  }
+}; // complete this statement
 
 if (groupIsOnlyStudents) {
   console.log("The group contains only students");
diff --git a/1-exercises/D-array-filter/exercise.js b/1-exercises/D-array-filter/exercise.js
index 51837028..bd613343 100644
--- a/1-exercises/D-array-filter/exercise.js
+++ b/1-exercises/D-array-filter/exercise.js
@@ -8,7 +8,9 @@
 
 let pairsByIndexRaw = [[0, 3], [1, 2], [2, 1], null, [1], false, "whoops"];
 
-let pairsByIndex; // Complete this statement
+let pairsByIndex = pairsByIndexRaw.filter(function (item) {
+  return Array.isArray(item) && item.length === 2;
+}); // Complete this statement
 
 let students = ["Islam", "Lesley", "Harun", "Rukmini"];
 let mentors = ["Daniel", "Irina", "Mozafar", "Luke"];
@@ -24,4 +26,4 @@ console.log(pairs);
 /* EXPECTED RESULT
 
   [ [ 'Islam', 'Luke' ], [ 'Lesley', 'Mozafar' ], [ 'Harun', 'Irina' ] ]
-*/
\ No newline at end of file
+*/
diff --git a/1-exercises/E-array-map/exercise.js b/1-exercises/E-array-map/exercise.js
index 5a157279..dd28253a 100644
--- a/1-exercises/E-array-map/exercise.js
+++ b/1-exercises/E-array-map/exercise.js
@@ -3,11 +3,11 @@
 
 let numbers = [0.1, 0.2, 0.3, 0.4, 0.5];
 
-let numbersMultipliedByOneHundred; // complete this statement
+let numbersMultipliedByOneHundred = numbers.map((element) => element * 100); // complete this statement
 
 console.log(numbersMultipliedByOneHundred);
 
 /* EXPECTED RESULT
 
   [10, 20, 30, 40, 50]
-*/
\ No newline at end of file
+*/
diff --git a/1-exercises/F-array-forEach/exercise.js b/1-exercises/F-array-forEach/exercise.js
index 985068cc..6fb63357 100644
--- a/1-exercises/F-array-forEach/exercise.js
+++ b/1-exercises/F-array-forEach/exercise.js
@@ -9,6 +9,19 @@
 
 let arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
 
+arr.forEach((number) => {
+  if (number % 3 === 0 && number % 5 === 0) {
+    console.log("FizzBuzz");
+  } else if (number % 3 === 0) {
+    console.log("Fizz");
+  } else if (number % 5 === 0) {
+    console.log("Buzz");
+  } else {
+    console.log(number);
+  }
+});
+
+console.log(filteredNumbers);
 /* EXPECTED OUTPUT */
 
 /*
diff --git a/1-exercises/G-array-methods/exercise.js b/1-exercises/G-array-methods/exercise.js
index 4367ef6e..bc504f2a 100644
--- a/1-exercises/G-array-methods/exercise.js
+++ b/1-exercises/G-array-methods/exercise.js
@@ -4,7 +4,7 @@
 */
 
 let numbers = [3, 2, 1];
-let sortedNumbers; // complete this statement
+let sortedNumbers = numbers.sort(); // complete this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE
diff --git a/1-exercises/G-array-methods/exercise2.js b/1-exercises/G-array-methods/exercise2.js
index 4c68c3a6..d49597b6 100644
--- a/1-exercises/G-array-methods/exercise2.js
+++ b/1-exercises/G-array-methods/exercise2.js
@@ -7,7 +7,7 @@
 let mentors = ["Daniel", "Irina", "Rares"];
 let students = ["Rukmini", "Abdul", "Austine", "Swathi"];
 
-let everyone; // complete this statement
+let everyone = mentor.concat(...students); // complete this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE
diff --git a/1-exercises/H-array-methods-2/exercise.js b/1-exercises/H-array-methods-2/exercise.js
index 59c5daa7..45fd2c5e 100644
--- a/1-exercises/H-array-methods-2/exercise.js
+++ b/1-exercises/H-array-methods-2/exercise.js
@@ -15,8 +15,8 @@ let everyone = [
   "Swathi",
 ];
 
-let firstFive; // complete this statement
-let lastFive; // complete this statement
+let firstFive = everyone.slice(0,5); // complete this statement
+let lastFive = everyone.slice(-5); // complete this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE
diff --git a/1-exercises/H-array-methods-2/exercise2.js b/1-exercises/H-array-methods-2/exercise2.js
index 14bb4318..99b8823e 100644
--- a/1-exercises/H-array-methods-2/exercise2.js
+++ b/1-exercises/H-array-methods-2/exercise2.js
@@ -7,7 +7,13 @@
   Tip: use the string method .split() and the array method .join()
 */
 
-function capitalise(str) {}
+function capitalise(str) {
+ let strString = str.split("")
+ let strFirst = strString[0].toUpperCase()
+ let strCombined = strFirst.concat(str.slice(1))
+ return strCombined 
+
+}
 
 /* 
   DO NOT EDIT BELOW THIS LINE
diff --git a/1-exercises/H-array-methods-2/exercise3.js b/1-exercises/H-array-methods-2/exercise3.js
index c8e079e4..6a832239 100644
--- a/1-exercises/H-array-methods-2/exercise3.js
+++ b/1-exercises/H-array-methods-2/exercise3.js
@@ -7,7 +7,12 @@
 let ukNations = ["Scotland", "Wales", "England", "Northern Ireland"];
 
 function isInUK(country) {
-  return; // complete this statement
+if (ukNations.includes(country)){
+return true
+}
+ else{
+ return "Not a UK country"
+ }
 }
 
 /* 
diff --git a/1-exercises/J-string-substring/exercise.js b/1-exercises/J-string-substring/exercise.js
index 4624db68..35c09931 100644
--- a/1-exercises/J-string-substring/exercise.js
+++ b/1-exercises/J-string-substring/exercise.js
@@ -6,7 +6,7 @@
 
 let statement = "I like programming and dogs";
 
-statement = statement.substring();
+statement = statement.substring(0,18);
 
 console.log(statement);
 
diff --git a/1-exercises/J-string-substring/exercise2.js b/1-exercises/J-string-substring/exercise2.js
index a1d9bf62..8a70eace 100644
--- a/1-exercises/J-string-substring/exercise2.js
+++ b/1-exercises/J-string-substring/exercise2.js
@@ -24,6 +24,28 @@ names.forEach((name) => {
   console.log(name);
 });
 
+/*Other function j
+
+function getFirstNames (){
+let splitNames =[]
+for(let i =0; i<names.length; i++){
+splitNames.push(names[i].split(" "))
+}
+
+console.log(splitNames)
+
+let firstNames = []
+
+for(let i =0; i<splitNames.length; i++){
+firstNames.push(splitNames[i][0])
+}
+
+console.log(firstNames)
+//returns names as an array
+}
+
+*/
+
 /* EXPECTED OUTPUT 
 
   "Tamzin"
diff --git a/1-exercises/J-string-substring/exercise3.js b/1-exercises/J-string-substring/exercise3.js
index 14f77417..a8e42667 100644
--- a/1-exercises/J-string-substring/exercise3.js
+++ b/1-exercises/J-string-substring/exercise3.js
@@ -7,11 +7,22 @@
 */
 
 let statement = "I do not like programming";
-
 let result = "";
 
-console.log(result);
+let wordToRemove = "not";
+
+let index = statement.indexOf(wordToRemove);
+
+if (index !== -1) {
+  let length = wordToRemove.length;
+
+  let firstPart = statement.substring(0, index);
+  let secondPart = statement.substring(index + length);
+
+  result = firstPart + secondPart;
 
+  console.log(result);
+}
 /* EXPECTED OUTPUT 
 
   "I do like programming"
diff --git a/2-mandatory/1-create-functions.js b/2-mandatory/1-create-functions.js
index 6df12961..60d9981a 100644
--- a/2-mandatory/1-create-functions.js
+++ b/2-mandatory/1-create-functions.js
@@ -3,7 +3,9 @@ Write a function that:
 - Accepts an array as a parameter.
 - Returns a new array containing the first five elements of the passed array.
 */
-function first5() {
+function first5(arr) {
+  for (let i =0; i < 5 ; i++  ){
+    return arr[i]
 }
 
 /*
@@ -11,7 +13,9 @@ Write a function that:
 - Accepts an array as a parameter.
 - Returns a new array containing the same elements, except sorted.
 */
-function sortArray() {
+function sortArray(arr) {
+ let arrSorted = arr.sort()
+ return arrSorted
 }
 
 /*
@@ -24,7 +28,11 @@ Write a function that:
 - Removes any forward slashes (/) in the strings.
 - Makes the strings all lowercase.
 */
-function tidyUpString() {
+function tidyUpString(str) {
+  trimStr = str.trim();
+  mystring = trimStr.replace('/','');
+  lowerStr = mystring.toLowerCase()
+
 }
 
 /*
@@ -33,7 +41,9 @@ Write a function that:
 - Returns a new array containing the same elements, but without the element at the passed index.
 */
 
-function remove() {
+function remove(arr, index) {
+  arr.splice(index, 1);
+ return arr;
 }
 
 /*
@@ -44,7 +54,42 @@ Write a function that:
 - Numbers greater 100 must be replaced with 100.
 */
 
-function formatPercentage() {
+/*function formatPercentage(arr) {
+let arrD = []
+let arrE = []
+let arrB = arr.toString()
+console.log(arrB)
+let arrC = arrB.split(",")
+console.log(arrC)
+for (let i = 0; i < arrC.length; i++){
+ arrD.push(arrC[i] + "!")
+}  
+
+console.log(arrD)
+
+for (let num of arrD){
+if (num.length > 3){
+arrE.push('100%')
+}
+else{ 
+arrE.push(num)
+}
+
+ 
+  }
+
+formatPercentage([1,2,1000,5,6,34])*/
+
+function formatPercentage(arr) {
+  let result = [];
+  for (const number of arr) {
+    if (number > 100) {
+      result.push('100%')
+    } else {
+      result.push(`${Number(number.toFixed(2))}%`)
+    }
+  }
+  return result;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
diff --git a/2-mandatory/2-oxygen-levels.js b/2-mandatory/2-oxygen-levels.js
index 5711c5e5..1210312c 100644
--- a/2-mandatory/2-oxygen-levels.js
+++ b/2-mandatory/2-oxygen-levels.js
@@ -11,7 +11,21 @@
     Some string methods that might help you here are .replace() and .substring().
 */
 
-function findSafeOxygenLevel() {}
+function findSafeOxygenLevel() {
+   let firstProperPlanet = "" ;
+  for (const oxygenlevel of oxygenLevels) {
+    if(oxygenlevel.includes('%')) {
+      const oxygenlevelNum = Number(oxygenlevel.replace('%', ''));
+      if (oxygenlevelNum > 19.5 && oxygenlevelNum < 23.5){
+        firstProperPlanet = oxygenlevel;
+        break
+    }} else {
+      continue
+    } 
+  }
+  let output = firstProperPlanet === "" ? undefined : firstProperPlanet;
+  return output;
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
diff --git a/2-mandatory/3-bush-berries.js b/2-mandatory/3-bush-berries.js
index b434a507..aa4b2068 100644
--- a/2-mandatory/3-bush-berries.js
+++ b/2-mandatory/3-bush-berries.js
@@ -22,9 +22,20 @@
 */
 
 function isBushSafe(berryArray) {
+  if (berryArray.every() == "pink") {
+    return "Bush is safe to eat";
+  } else {
+    return "Toxic! Leave bush alone!";
+  }
   //Write your code here
 }
 
+const bushIsSafe = berryArray.every((color) => color == "pink");
+const output = bushIsSafe
+  ? "Bush is safe to eat from"
+  : "Toxic! Leave bush alone!";
+return output;
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 test("isBushSafe finds toxic busy", () => {
diff --git a/2-mandatory/4-space-colonies.js b/2-mandatory/4-space-colonies.js
index 30095213..128b7dae 100644
--- a/2-mandatory/4-space-colonies.js
+++ b/2-mandatory/4-space-colonies.js
@@ -15,7 +15,9 @@
   
 */
 
-function getSettlers() {}
+function getSettlers() {
+  return allpeople.filter(person => person.includes('family') && person.startsWith('A'));
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
diff --git a/2-mandatory/5-eligible-students.js b/2-mandatory/5-eligible-students.js
index f92478e0..0d5825e8 100644
--- a/2-mandatory/5-eligible-students.js
+++ b/2-mandatory/5-eligible-students.js
@@ -7,7 +7,12 @@
   - Returns an array containing only the names of the who have attended AT LEAST 8 classes
 */
 
-function getEligibleStudents() {}
+function getEligibleStudents() {
+  let examClass = [];
+  for (student in attendance){
+    if student[1]
+  }
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
diff --git a/2-mandatory/6-journey-planner.js b/2-mandatory/6-journey-planner.js
index 25a14083..4b13d761 100644
--- a/2-mandatory/6-journey-planner.js
+++ b/2-mandatory/6-journey-planner.js
@@ -20,7 +20,7 @@
 function checkCodeIsThere(stringText) {
   let magicWord = "code";
   //edit code below
-  if (stringText) {
+  if (stringText.includes("code")) {
     return stringText;
   } else {
     return "Not found";
@@ -64,7 +64,9 @@ function checkCodeIsThere(stringText) {
 
   Hint: Use the corresponding array method to split the array.
 */
-function getTransportModes() {}
+function getTransportModes(arr) {
+  return arr.splice(1)
+}
 
 /*
   Implement the function isAccessibleByTransportMode that
@@ -81,7 +83,12 @@ function getTransportModes() {}
 
   Hint: Use the corresponding array method to decide if an element is included in an array.
 */
-function isAccessibleByTransportMode() {}
+function isAccessibleByTransportMode(arr, transport) {
+if (arr.includes(transport)){
+console.log(true) 
+}else{console.log(false)}
+}
+
 
 /*
   Implement the function getLocationName that
@@ -92,7 +99,9 @@ function isAccessibleByTransportMode() {}
    - Returns the name of the location
       e.g: "Tower Bridge"
 */
-function getLocationName() {}
+function getLocationName(arr) {
+  return arr[0]
+}
 
 /*
  We arrived at the final method. it won't take long if you use the previously implemented functions wisely.