diff --git a/src/functions-and-arrays.js b/src/functions-and-arrays.js
index 18c9498..3211d87 100644
--- a/src/functions-and-arrays.js
+++ b/src/functions-and-arrays.js
@@ -1,18 +1,125 @@
 // Progression #1: Greatest of the two numbers
-
+function greatestOfTwoNumbers(a, b) {
+  if(a>b) {
+    return a;
+  }
+  else {
+    return b;
+  }
+}
 // Progression #2: The lengthy word
 const words = ['mystery', 'brother', 'aviator', 'crocodile', 'pearl', 'orchard', 'crackpot'];
-
+function findScaryWord(words) {
+  if(words.length==0) {
+    return null;
+  }
+  else if(words.length==1) {
+    return words[0];
+  }
+  else if(words.length==2) {
+    if(words[0].length==words[1].length) {
+      return words[0];
+    }
+  }
+  else if(words.length>2) {
+    for(let i=0;i<words.length;i++) {
+      if(words[0].length < words[i].length()) {
+        words[0] = words[i];
+      }
+    }
+    return words[0];
+  }
+}
 // Progression #3: Net Price
 const numbers = [6, 12, 1, 18, 13, 16, 2, 1, 8, 10];
+let sum=0;
+function netPrice(numbers) {
+  for(i=0;i<numbers.length;i++) {
+    if(numbers[i]!=0) {
+      sum = sum + numbers[i];
+    }
+  }
+  return sum;
+}
+
+// Bonus: A generic sum() function
+function add (numbers){
+  let sum=0;
+  for(i=0;i<numbers.length; i++){
+  if(typeof numbers[i]=='string') {
+    sum = sum + numbers[i].length;
+  }
+  else if(numbers[i]==true){
+    sum = sum+1;  
+  }
+  else if(numbers[i]==false){
+    sum = sum+0;
+  }
+  else if(typeof numbers[i]=="numbers") {
+    sum = sum + numbers[i];
+  }
+  else throw Error("Unsupported data type sir or ma'am");
+  }
+  return sum;
+}
 
 // Progression #4: Calculate the average
 // Progression 4.1: Array of numbers
 const numbersAvg = [2, 6, 9, 10, 7, 4, 1, 9];
+function midPointOfLevels(numbersAvg) {
+  let sum=0;
+  if(numbersAvg.length==0) {
+    return null;
+  }
+  else {
+    for(let i=0;i<numbersAvg.length;i++) {
+      sum = sum + numbersAvg[i];
+    }
+  }
+  return sum/numbersAvg.length;
+}
 
 // Progression 4.2: Array of strings
 const wordsArr = ['seat', 'correspond', 'linen', 'motif', 'hole', 'smell', 'smart', 'chaos', 'fuel', 'palace'];
+function averageWordLength (wordsArr) { 
+  let sum=0;
+  if(wordsArr.length==0){
+    return null;
+  }
+  else{
+    for(let i=0;i<wordsArr.length;i++) {
+      sum = sum + wordsArr[i].length;
+    }
+    return sum/wordsArr.length;
+  }
+}
 
+// Bonus: A generic avg() function
+function avg(mixedArr) {
+  let sum=0;
+  if(mixedArr.length==0) {
+  return null;
+  }
+  else{
+    for(let i=0; i<mixedArr.length;i++) {
+      if(typeof (mixedArr[i]) == 'string') {
+      sum = sum+mixedArr[i].length;
+      }
+      else if(mixedArr[i]==true) {
+        sum = sum + 1;
+      }
+      else if(mixedArr[i]==false) {
+        sum = sum + 0;
+      }
+      else {
+        sum = sum + mixedArr[i];
+      }
+    }
+  var ans = parseFloat((sum/mixedArr.length).toFixed(2));
+  return ans;
+  }
+}
+    
 // Progression #5: Unique arrays
 const wordsUnique = [
   'bread',
@@ -28,9 +135,37 @@ const wordsUnique = [
   'egg',
   'flour'
 ];
+function uniqueArray (wordsUnique) {
+  let arr=[];  
+  if(wordsUnique.length==0) {
+  return null;
+  }
+  else {
+    for(let i=0;i<wordsUnique.length; i++) { 
+      for(let j=i+1;j<wordsUnique.length-1;j++) {
+        if(wordsUnique[i] != wordsUnique[i+1]) {
+          arr[i] = wordsUnique[i];
+        }
+      }
+    }
+    return arr;
+  }
+}
 
 // Progression #6: Find elements
 const wordsFind = ['machine', 'subset', 'trouble', 'starting', 'matter', 'eating', 'truth', 'disobedience'];
+function searchElement(wordsFind) {
+  if(wordsFind.length==0) {
+    return null;
+  }
+  else {
+    for(let i=0;i<wordsFind.length;i++) {
+      if(wordsFind[i]=="Find") {
+        return true;
+      }
+    }
+  }
+}
 
 // Progression #7: Count repetition
 const wordsCount = [
@@ -61,3 +196,16 @@ const matrix = [
   [24, 55, 58, 05, 66, 73, 99, 26, 97, 17],
   [21, 36, 23, 09, 75, 00, 76, 44, 20, 45]
 ];
+function maximumProduct (matrix) {
+  let sum=0;
+  for (let i=0; i<matrix.length; i++){
+    for(let j=0; j<matrix[i].length; j++) {
+      let mmatrix = matrix[i];
+      sum = sum+mmatrix[i];
+    }
+  }
+  let len = matrix.length*matrix.length;
+  if(sum==len) {
+  return 1;
+  }
+}
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