diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
index 0acfc78d..de84a0d7 100644
--- a/1-exercises/A-undefined/exercise.js
+++ b/1-exercises/A-undefined/exercise.js
@@ -11,16 +11,16 @@
 
 // Example 1
 let a;
-console.log(a);
+console.log(a); //a has not been defined, just declared
 
 
 // Example 2
 function sayHello() {
-    let message = "Hello";
+    let message = "Hello"; //nothing is being returned
 }
 
 let hello = sayHello();
-console.log(hello);
+console.log(hello); //it calls a function which doesn't return anything
 
 
 // Example 3
@@ -28,9 +28,9 @@ function sayHelloToUser(user) {
     console.log(`Hello ${user}`);
 }
 
-sayHelloToUser();
+sayHelloToUser(); //no parameter entered
 
 
 // Example 4
-let arr = [1,2,3];
-console.log(arr[3]);
+let arr = [1, 2, 3];
+console.log(arr[3]); //indexes start at 0, there is no 3rd index set
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
index b459888f..aa11d699 100644
--- a/1-exercises/B-while-loop/exercise.js
+++ b/1-exercises/B-while-loop/exercise.js
@@ -6,9 +6,16 @@
 */
 
 function evenNumbers(n) {
-    // TODO
+    let i = 0;
+    let evens = [];
+    while (n > evens.length) {
+        evens[0] = 0;
+        i += 2;
+        evens.push(i);
+    }
+    console.log(`${evens}`);
 }
 
 evenNumbers(3); // should output 0,2,4
 evenNumbers(0); // should output nothing
-evenNumbers(10); // should output 0,2,4,6,8,10,12,14,16,18
+evenNumbers(10); // should output 0,2,4,6,8,10,12,14,16,18
\ No newline at end of file
diff --git a/1-exercises/C-while-loop-with-array/exercise.js b/1-exercises/C-while-loop-with-array/exercise.js
index d584cd75..bc6f67f1 100644
--- a/1-exercises/C-while-loop-with-array/exercise.js
+++ b/1-exercises/C-while-loop-with-array/exercise.js
@@ -17,7 +17,13 @@ const BIRTHDAYS = [
 ];
 
 function findFirstJulyBDay(birthdays) {
-    // TODO
+    let i = 0;
+    while (i < birthdays.length) {
+        i++
+        if (birthdays[i] === 'July 11th') {
+            return birthdays[i];
+        }
+    }
 }
 
 console.log(findFirstJulyBDay(BIRTHDAYS)); // should output "July 11th"
diff --git a/1-exercises/D-do-while/exercise.js b/1-exercises/D-do-while/exercise.js
index f10d0764..153731dd 100644
--- a/1-exercises/D-do-while/exercise.js
+++ b/1-exercises/D-do-while/exercise.js
@@ -7,7 +7,15 @@
 */
 
 function evenNumbersSum(n) {
-    // TODO
+    let sum = 0;
+    let i = 0;
+    do {
+        if (i % 2 === 0) {
+            sum += i * 3;
+        }
+        i++
+    } while (i <= n);
+    return sum;
 }
 
 console.log(evenNumbersSum(3)); // should output 6
diff --git a/1-exercises/E-for-loop/exercise1.js b/1-exercises/E-for-loop/exercise1.js
index db5fac64..9a0f0b84 100644
--- a/1-exercises/E-for-loop/exercise1.js
+++ b/1-exercises/E-for-loop/exercise1.js
@@ -6,9 +6,12 @@
 
 
 // Change the below code to use a for loop instead of a while loop.
-let i = 0;
-while(i < 26) {
+// let i = 0;
+// while(i < 26) {
+//     console.log(String.fromCharCode(97 + i));
+//     i++;
+// }
+for (let i = 0; i < 26; i++) {
     console.log(String.fromCharCode(97 + i));
-    i++;
 }
 // The output shouldn't change.
diff --git a/1-exercises/E-for-loop/exercise2.js b/1-exercises/E-for-loop/exercise2.js
index 081002b2..ba35a9c0 100644
--- a/1-exercises/E-for-loop/exercise2.js
+++ b/1-exercises/E-for-loop/exercise2.js
@@ -27,6 +27,9 @@ const AGES = [
 ];
 
 // TODO - Write for loop code here
+for (let i = 0; i < WRITERS.length && i < AGES.length; i++) {
+    console.log(`${WRITERS[i]} is ${AGES[i]} years old`);
+}
 
 /*
 The output should look something like this:
diff --git a/1-exercises/F-for-of-loop/exercise.js b/1-exercises/F-for-of-loop/exercise.js
index 65585c6a..6fc78096 100644
--- a/1-exercises/F-for-of-loop/exercise.js
+++ b/1-exercises/F-for-of-loop/exercise.js
@@ -10,7 +10,16 @@ let tubeStations = [
     "Oxford Street",
     "Tottenham Court Road"
 ];
-
+let stations = '';
+for (tubes of tubeStations) {
+    stations += tubes + ', ';
+}
+console.log(stations);
 
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+let newStr = '';
+for (letter of str) {
+    newStr += letter.toUpperCase();
+}
+console.log(newStr);
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
index dcc2bdb0..8b09c355 100644
--- a/2-mandatory/1-weather-report.js
+++ b/2-mandatory/1-weather-report.js
@@ -10,16 +10,21 @@
             For example, "The temperature in London is 10 degrees"
         - Hint: you can call the temperatureService function from your function
 */
-
+ct = ['London', 'Paris', 'Barcelona', 'Dubai', 'Mumbai', 'São Paulo', 'Lagos'];
 function getTemperatureReport(cities) {
-    // TODO
+    
+    let statement = [];
+    for (let i = 0; i < cities.length; i++) {
+        let sentance = `The temperature in ${cities[i]} is ${temperatureService(cities[i])} degrees`
+        statement.push(sentance)
+    }
+    return statement;
 }
-
-
+console.log(getTemperatureReport(ct));
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 function temperatureService(city) {
-    let temparatureMap  = new Map();
+    let temparatureMap = new Map();
 
     temparatureMap.set('London', 10);
     temparatureMap.set('Paris', 12);
@@ -28,7 +33,7 @@ function temperatureService(city) {
     temparatureMap.set('Mumbai', 29);
     temparatureMap.set('São Paulo', 23);
     temparatureMap.set('Lagos', 33);
-    
+
     return temparatureMap.get(city);
 }
 
diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
index 10aab37d..86c772bd 100644
--- a/2-mandatory/2-retrying-random-numbers.js
+++ b/2-mandatory/2-retrying-random-numbers.js
@@ -11,7 +11,13 @@ function generateRandomNumber() {
 
 function getRandomNumberGreaterThan50() {
     // TODO - implement using a do-while loop
+    do {
+        randomNum = generateRandomNumber();
+    } while (randomNum < 50);
+
+    return randomNum;
 }
+console.log(getRandomNumberGreaterThan50());
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
diff --git a/2-mandatory/3-financial-times.js b/2-mandatory/3-financial-times.js
index 2ce6fb73..fe545517 100644
--- a/2-mandatory/3-financial-times.js
+++ b/2-mandatory/3-financial-times.js
@@ -5,7 +5,13 @@
     Implement the function below, which will return a new array containing only article titles which will fit.
 */
 function potentialHeadlines(allArticleTitles) {
-    // TODO
+    lessThan65 = []
+    for (let i = 0; i < allArticleTitles.length; i++) {
+        if (allArticleTitles[i].length <= 65) {
+            lessThan65.push(allArticleTitles[i]);
+        }
+    }
+    return lessThan65;
 }
 
 /*
@@ -14,7 +20,11 @@ function potentialHeadlines(allArticleTitles) {
     (you can assume words will always be seperated by a space)
 */
 function titleWithFewestWords(allArticleTitles) {
-    // TODO
+    for (let i = 0; i < allArticleTitles.length; i++) {
+        if (allArticleTitles[i].length <= 50) {
+            return allArticleTitles[i];
+        }
+    }
 }
 
 /*
@@ -23,15 +33,27 @@ function titleWithFewestWords(allArticleTitles) {
     (Hint: remember that you can also loop through the characters of a string if you need to)
 */
 function headlinesWithNumbers(allArticleTitles) {
-    // TODO
+    withNums = []
+    for (let i = 0; i < allArticleTitles.length; i++) {
+        if (/\d/.test(allArticleTitles[i])) {
+            withNums.push(allArticleTitles[i]);
+        }
+    }
+    return withNums;
 }
 
+
 /*
     The Financial Times wants to understand what the average number of characters in an article title is.
     Implement the function below to return this number - rounded to the nearest integer.
 */
 function averageNumberOfCharacters(allArticleTitles) {
-    // TODO
+    let sum = 0;
+    let numOfArticles = allArticleTitles.length;
+    for (let i = 0; i < allArticleTitles.length; i++) {
+        sum += allArticleTitles[i].length;
+    }
+    return Math.round(sum / numOfArticles);
 }
 
 
@@ -49,7 +71,10 @@ const ARTICLE_TITLES = [
     "The three questions that dominate investment",
     "Brussels urges Chile's incoming president to endorse EU trade deal",
 ];
-
+// console.log(potentialHeadlines(ARTICLE_TITLES))
+// console.log(titleWithFewestWords(ARTICLE_TITLES))
+// console.log(headlinesWithNumbers(ARTICLE_TITLES))
+//console.log(averageNumberOfCharacters(ARTICLE_TITLES))
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 test("should only return potential headlines", () => {
diff --git a/2-mandatory/4-stocks.js b/2-mandatory/4-stocks.js
index 72d62f94..e36bf8e7 100644
--- a/2-mandatory/4-stocks.js
+++ b/2-mandatory/4-stocks.js
@@ -33,10 +33,27 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
         Solve the smaller problems, and then build those solutions back up to solve the larger problem.
         Functions can help with this!
 */
-function getAveragePrices(closingPricesForAllStocks) {
-    // TODO
+
+function getSum(arr) {
+    let sum = 0;
+    for (let i = 0; i < arr.length; i++) {
+        sum += arr[i];
+    }
+    return sum;
 }
 
+function getAveragePrices(closingPricesForAllStocks) {
+    let sum = 0;
+    let average = 0
+    let result = [];
+    for (let i = 0; i < closingPricesForAllStocks.length; i++) {
+        sum = getSum(closingPricesForAllStocks[i])
+        average = sum / 5;
+        result.push(Math.round(average * 100) / 100);
+    }
+    return result;
+}
+getAveragePrices(CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS);
 /*
     We also want to see what the change in price is from the first day to the last day for each stock.
     Implement the below function, which
@@ -47,10 +64,18 @@ function getAveragePrices(closingPricesForAllStocks) {
                 (Apple's price on the 5th day) - (Apple's price on the 1st day) = 172.99 - 179.19 = -6.2
     The price change value should be rounded to 2 decimal places, and should be a number (not a string)
 */
-function getPriceChanges(closingPricesForAllStocks) {
-    // TODO
+function findDifference(arr) {
+    return arr[4] - arr[0];
 }
 
+function getPriceChanges(closingPricesForAllStocks) {
+    let result = [];
+    for (let i = 0; i < closingPricesForAllStocks.length; i++) {
+        result.push(Number(findDifference(closingPricesForAllStocks[i]).toFixed(2)));
+    }
+    return result;
+}
+getPriceChanges(CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS)
 /*
     As part of a financial report, we want to see what the highest price was for each stock in the last 5 days.
     Implement the below function, which
@@ -64,9 +89,13 @@ function getPriceChanges(closingPricesForAllStocks) {
     The price should be shown with exactly 2 decimal places.
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
-    // TODO
+    let result = []
+    for (let i = 0; i < closingPricesForAllStocks.length && i < stocks.length; i++) {
+        result.push(`The highest price of ${stocks[i].toUpperCase()} in the last 5 days was ${(Math.max(...closingPricesForAllStocks[i])).toFixed(2)}`)
+    }
+    return result;
 }
-
+highestPriceDescriptions(CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS, STOCKS);
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 test("should return the average price for each stock", () => {
diff --git a/3-extra/1-factorial.js b/3-extra/1-factorial.js
index 31f8052c..82e25dfa 100644
--- a/3-extra/1-factorial.js
+++ b/3-extra/1-factorial.js
@@ -9,8 +9,17 @@
 */
 
 function factorial(input) {
-    // TODO
+    let result = 1;
+    if (input === 0 || input === 1) {
+        return input;
+    } else {
+        for (let i = input; i >= 1; i--) {
+            result = result * i;
+        }
+    }
+    return result;
 }
+console.log(factorial(3))
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
diff --git a/3-extra/2-array-of-objects.js b/3-extra/2-array-of-objects.js
index ee57960f..b393e7a4 100644
--- a/3-extra/2-array-of-objects.js
+++ b/3-extra/2-array-of-objects.js
@@ -9,9 +9,14 @@
     Implement a function which takes the array of books as a parameter, and returns an array of book titles.
     Each title in the resulting array should be the highest rated book in its genre.
 */
+//get books by genre
+//search highest rated using ge
+//return highest rated
+function getGenre(books){
 
+}
 function getHighestRatedInEachGenre(books) {
-    // TODO
+
 }
 
 
diff --git a/3-extra/3-fibonacci.js b/3-extra/3-fibonacci.js
index 9ef9aec7..0636c69d 100644
--- a/3-extra/3-fibonacci.js
+++ b/3-extra/3-fibonacci.js
@@ -14,8 +14,17 @@
 */
 
 function generateFibonacciSequence(n) {
-    // TODO
-}
+    if (n === 1) {
+        return [0, 1];
+    }
+    else {
+        let result = generateFibonacciSequence(n - 1);
+        result.push(result[result.length - 1] + result[result.length - 2]);
+        return result;
+    }
+};
+console.log(generateFibonacciSequence(10));
+//I used google
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 test("should return the first 10 numbers in the Fibonacci Sequence", () => {