diff --git a/week-3/1-exercises/A-array-find/exercise.js b/week-3/1-exercises/A-array-find/exercise.js
index d7fd51f..4419033 100644
--- a/week-3/1-exercises/A-array-find/exercise.js
+++ b/week-3/1-exercises/A-array-find/exercise.js
@@ -6,8 +6,12 @@
 // write your code here
 
 var names = ["Rakesh", "Antonio", "Alexandra", "Andronicus", "Annam", "Mikey", "Anastasia", "Karim", "Ahmed"];
+function findLongNameThatStartsWithA(names){
+  return names.length > 7 && names.charAt(0) === "A";
+}
 
-var longNameThatStartsWithA = findLongNameThatStartsWithA(names);
+
+var longNameThatStartsWithA = names.find(findLongNameThatStartsWithA);
 
 console.log(longNameThatStartsWithA);
 
diff --git a/week-3/1-exercises/B-array-some/exercise.js b/week-3/1-exercises/B-array-some/exercise.js
index 965c052..783b028 100644
--- a/week-3/1-exercises/B-array-some/exercise.js
+++ b/week-3/1-exercises/B-array-some/exercise.js
@@ -18,6 +18,9 @@ var mentors = ["Daniel", "Irina", "Mozafar", "Luke"];
 var pairs = pairsByIndex.map(function(indexes) {
   var student = students[indexes[0]];
   var mentor = mentors[indexes[1]];
+  if (pairsByIndex[indexes] == null){
+    process.exit(1);
+  }
   return [student, mentor];
 });
 
diff --git a/week-3/1-exercises/C-array-every/exercise.js b/week-3/1-exercises/C-array-every/exercise.js
index b515e94..029ad0f 100644
--- a/week-3/1-exercises/C-array-every/exercise.js
+++ b/week-3/1-exercises/C-array-every/exercise.js
@@ -3,11 +3,18 @@
 */
 
 var students = ["Omar", "Austine", "Dany", "Swathi", "Lesley", "Rukmini"];
+ // var group = ["Omar", "Austine", "Dany", "Lesley"]; // for test
 var group = ["Austine", "Dany", "Swathi", "Daniel"];
 
-var groupIsOnlyStudents; // complete this statement
+function isGroupStudents(name){
 
-if (groupIsOnlyStudents) {
+  return students.includes(name);
+  
+}
+
+var groupIsOnlyStudents = group.every(isGroupStudents) // complete this statement
+
+if (groupIsOnlyStudents === true) {
   console.log("The group contains only students");
 } else {
   console.log("The group does not contain only students");
diff --git a/week-3/1-exercises/D-array-filter/exercise.js b/week-3/1-exercises/D-array-filter/exercise.js
index 6e32cc6..f9a1086 100644
--- a/week-3/1-exercises/D-array-filter/exercise.js
+++ b/week-3/1-exercises/D-array-filter/exercise.js
@@ -8,7 +8,9 @@
 
 var pairsByIndexRaw = [[0, 3], [1, 2], [2, 1], null, [1], false, "whoops"];
 
-var pairsByIndex; // Complete this statement
+var pairsByIndex = pairsByIndexRaw.filter(function (pairsByIndexRaw){
+  return pairsByIndexRaw[0,[0]];
+}); // Complete this statement
 
 var students = ["Islam", "Lesley", "Harun", "Rukmini"];
 var mentors = ["Daniel", "Irina", "Mozafar", "Luke"];
diff --git a/week-3/1-exercises/E-array-map/exercise.js b/week-3/1-exercises/E-array-map/exercise.js
index 2835e92..c67b218 100644
--- a/week-3/1-exercises/E-array-map/exercise.js
+++ b/week-3/1-exercises/E-array-map/exercise.js
@@ -2,4 +2,37 @@
 // Write multiple solutions using different syntax (as shown in the README)
 
 var numbers = [0.1, 0.2, 0.3, 0.4, 0.5];
+function multiplcation(numbers){
+    return numbers * 100;
+}
+var multipling = numbers.map(multiplcation);
+console.log(multipling);
 
+/////////////////////////////////////////////
+
+var multipling2 = numbers.map(function multiplcation2(numbers){
+    return numbers * 100;
+});
+console.log(multipling2);
+
+/////////////////////////////////////////////
+
+var multipling3 = numbers.map(function (numbers) {
+    return numbers * 100;
+});
+console.log(multipling3);
+
+/////////////////////////////////////////////
+
+
+var multipling4 = numbers.map( numbers => {
+    return numbers * 100;
+});
+console.log(multipling4);
+
+/////////////////////////////////////////////
+
+var multipling5 = numbers.map(numbers => numbers * 100
+);
+     
+console.log(multipling5);
diff --git a/week-3/2-mandatory/1-oxygen-levels.js b/week-3/2-mandatory/1-oxygen-levels.js
index f9d745f..33532bc 100644
--- a/week-3/2-mandatory/1-oxygen-levels.js
+++ b/week-3/2-mandatory/1-oxygen-levels.js
@@ -8,10 +8,22 @@ To be safe to land on, a planet needs to have an Oxygen level between 19.5% and
 
 Write a function that finds the first safe oxygen level in the array - Oxygen between 19.5% and 23.5%
 */
+function findRightPlanet(oxygenLevelOfPlanet) {
+  if (parseFloat(oxygenLevelOfPlanet) > 19.50 && parseFloat(oxygenLevelOfPlanet) < 23.50) {
+    return `${oxygenLevelOfPlanet}%`;
+  }
+   else {
+  return;
+   }
+}
+function safeLevels(oxygenLevel) {
+  return oxygenLevel.find(findRightPlanet);
+}
+  
+
+
 
-function safeLevels() {
 
-}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
@@ -19,33 +31,23 @@ const oxygenLevels1 = ["24.2%", "11.3%", "19.9%", "23.1%", "29.3%", "20.2%"];
 const oxygenLevels2 = ["30.8%", "23.5%", "18.8%", "19.5%", "20.2%", "31.6%"];
 const oxygenLevels3 = ["200%", "21.1%"];
 
-const util = require('util');
+const util = require("util");
 
 function test(test_name, actual, expected) {
-    let status;
-    if (actual === expected) {
-        status = "PASSED";
-    } else {
-        status = `FAILED: expected: ${util.inspect(expected)} but your function returned: ${util.inspect(actual)}`;
-    }
-
-    console.log(`${test_name}: ${status}`);
+  let status;
+  if (actual === expected) {
+    status = "PASSED";
+  } else {
+    status = `FAILED: expected: ${util.inspect(
+      expected
+    )} but your function returned: ${util.inspect(actual)}`;
+  }
+
+  console.log(`${test_name}: ${status}`);
 }
 
-test(
-    "safeLevels function works - case 1",
-    safeLevels(oxygenLevels1),
-    "19.9%"
-);
-
-test(
-    "safeLevels function works - case 2",
-    safeLevels(oxygenLevels2),
-    "20.2%"
-);
-
-test(
-    "safeLevels function works - case 3",
-    safeLevels(oxygenLevels3),
-    "21.1%"
-);
+test("safeLevels function works - case 1", safeLevels(oxygenLevels1), "19.9%");
+
+test("safeLevels function works - case 2", safeLevels(oxygenLevels2), "20.2%");
+
+test("safeLevels function works - case 3", safeLevels(oxygenLevels3), "21.1%");
diff --git a/week-3/2-mandatory/2-bush-berries.js b/week-3/2-mandatory/2-bush-berries.js
index aca45ad..d38cde6 100644
--- a/week-3/2-mandatory/2-bush-berries.js
+++ b/week-3/2-mandatory/2-bush-berries.js
@@ -10,8 +10,18 @@
   Use the tests to confirm which message to return
 */
 
-function bushChecker() {
-
+function checkColourPink(berryColour) {
+  if (berryColour === "pink") {
+    return true;
+  }
+}
+function bushChecker(allBerryColours) {
+  let result = allBerryColours.every(checkColourPink);
+  if (result === true) {
+    return "Bush is safe to eat from";
+  } else {
+    return "Toxic! Leave bush alone!";
+  }
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
diff --git a/week-3/2-mandatory/3-space-colonies.js b/week-3/2-mandatory/3-space-colonies.js
index 239eddd..c9005a5 100644
--- a/week-3/2-mandatory/3-space-colonies.js
+++ b/week-3/2-mandatory/3-space-colonies.js
@@ -7,11 +7,18 @@
 
   NOTE: don't include any element that is not a "family".
 */
+function filteringNames(names){
+  return names.includes("family") && names.charAt(0) === "A";
+}
 
-function colonisers() {
 
+function colonisers(voyagers) {
+  let result = voyagers.filter(filteringNames);
+  return result;
+  
 }
 
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 const voyagers = [
diff --git a/week-3/2-mandatory/4-eligible-students.js b/week-3/2-mandatory/4-eligible-students.js
index d8fe052..1072b40 100644
--- a/week-3/2-mandatory/4-eligible-students.js
+++ b/week-3/2-mandatory/4-eligible-students.js
@@ -4,13 +4,23 @@
   Create a function which:
   - Accepts an array which contains all the students' names and their attendance counts
     (see tests to confirm how this data will be structured)
-  - Returns an array containing only the names of the who have attended AT LEAST 8 classes
+  - Returns an array containing only the names of those who have attended AT LEAST 8 classes
 */
 
-function eligibleStudents() {
-
+ function eligibleStudents(attendances) {
+   let newAttendances =[];
+   for (i = 0; i < attendances.length; i++){
+     if (attendances[i][1] >= 8){
+      newAttendances.push(attendances[i][0]);
+     }
+   }
+ 
+   return newAttendances;
 }
 
+
+
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 const attendances = [
diff --git a/week-3/2-mandatory/5-journey-planner.js b/week-3/2-mandatory/5-journey-planner.js
index 816637d..b5c4624 100644
--- a/week-3/2-mandatory/5-journey-planner.js
+++ b/week-3/2-mandatory/5-journey-planner.js
@@ -7,9 +7,20 @@
   NOTE: only the names should be returned, not the means of transport.
 */
 
-function journeyPlanner() {
+function journeyPlanner(londonLocations, meansOfTransport ) {
+  let availableLocations = [];
+  for (i = 0; i < londonLocations.length; i++){
+    if (londonLocations[i].includes(meansOfTransport)){
+      availableLocations.push(londonLocations[i][0]);
+    }
+   
+  }
+ 
+  return availableLocations;
+  
 }
 
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 const londonLocations = [
diff --git a/week-3/2-mandatory/6-lane-names.js b/week-3/2-mandatory/6-lane-names.js
index ef4e1c5..719e04c 100644
--- a/week-3/2-mandatory/6-lane-names.js
+++ b/week-3/2-mandatory/6-lane-names.js
@@ -3,9 +3,12 @@
   
   Write a function that will return all street names which contain 'Lane' in their name.
 */
-
-function getLanes() {
-
+function lane(input){
+  return input.includes("Lane");
+}
+function getLanes(streetNames) {
+  let result = streetNames.filter(lane);
+  return result;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
diff --git a/week-3/2-mandatory/7-password-validator.js b/week-3/2-mandatory/7-password-validator.js
index d408ba6..927f373 100644
--- a/week-3/2-mandatory/7-password-validator.js
+++ b/week-3/2-mandatory/7-password-validator.js
@@ -21,9 +21,45 @@ Expected Result:
 PasswordValidationResult=  [false, false, false, false, true]
 
 */
+function PasswordLength(inputPassword) {
+  return inputPassword.length >= 5;
+}
 
-function validatePasswords(passwords) {
+function containsUpperCase(inputPassword) {
+  let regex = /[A-Z]/;
+  return regex.test(inputPassword);
+}
+function containsLowerCase(inputPassword) {
+  let regex = /[a-z]/;
+  return regex.test(inputPassword);
+}
+function containsNumbers(inputPassword) {
+  let regex = /[0-9]/;
+  return regex.test(inputPassword);
+}
+function containsSymbols(inputPassword) {
+  let regex = /[!#$%.*&]/;
+  return regex.test(inputPassword);
+}
+
+function isThereADuplicate(inputPassword) {
+  
+  for (i = 0; i < inputPassword.length; i++){
+    if (inputPassword === inputPassword[i + 1]){
+      return false;
+    } return true;
+  }
+  
+}
 
+function validatePasswords(inputPassword) {
+  return inputPassword.map(inputPassword => PasswordLength(inputPassword)
+    && containsUpperCase(inputPassword)
+    && containsLowerCase(inputPassword)
+    && containsNumbers(inputPassword)
+    && containsSymbols(inputPassword)
+    && isThereADuplicate(inputPassword)
+    );
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */