@@ -6,8 +6,8 @@
 */
 
 function calculateSalesTax(productPrice) {
-   
-  return productPrice*20/100+productPrice ; 
+   saleTax= 20/100;
+  return productPrice*saleTax+productPrice ; 
 
 }
 
@@ -25,14 +25,23 @@ console.log(calculateSalesTax(15));
      wrote a function for this!)
 */
 
-function addTaxAndFormatCurrency() {}
 
+function addTaxAndFormatCurrency(productPrice) {
+
+    saleTax= 20/100;
+    currency=  "£" ;
+  
+  
+    salePrice= productPrice* saleTax+ productPrice;
+    return currency + salePrice.toFixed(2) ;
+  
+  }
+  
+  
 
-function formatCurrency() {
 
-}
 
-/* ======= TESTS - DO NOT MODIFY =====
+/* ======= TESTS - DO NOT MODIFY ===== 
 There are some Tests in this file that will help you work out if your code is working.
 To run these tests type `node 4-tax.js` into your terminal
 */
 
@@ -59,16 +59,12 @@ function first5() {
 console.log(first5());
 
 
-function get3rdIndex(arr) {
+function get3rdIndex(array) {
 
-  let element= [11, 37, 62, 18, 19, 3, 30];
-
-
-  return element;
+  return array[3];
 }
-
-
-
+console.log(get3rdIndex(["fruit", "banana", "apple", "strawberry", "raspberry"]));
+console.log(get3rdIndex([11, 37, 62, 18, 19, 3, 30]));
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 
@@ -4,15 +4,16 @@ Write a function that:
 - removes any spaces in the beginning or end of the strings
 - removes any forward slashes (/) in the strings
 - makes the string all lowercase
-*//*
+*/
+
 function tidyUpString(strArr) {
 let tidU =["/Daniel ", "irina ", " Gordon", "ashleigh "];
 
   return ["daniel", "irina", "gordon","ashleigh"]
 
 }
 
-*/
+
 
 /*
 Complete the function to check if the variable `num` satisfies the following requirements:
@@ -40,8 +41,9 @@ Write a function that returns a copy of the given array arr, but with the elemen
 The function must NOT change the original array, arr.
 */
 
-//function remove(arr, index) {
-  //return; // complete this statement}
+function remove(arr, index) {
+return; // complete this statement
+}
 
 
 /*
@@ -52,7 +54,7 @@ Write a function that:
 - numbers greater 100 must be replaced with 100
 */
 
-//function formatPercentage(arr) {}
+function formatPercentage(arr) {}
 
 
 
@@ -81,7 +83,6 @@ function test(test_name, actual, expected) {
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
-
 function arraysEqual(a, b) {
   if (a === b) return true;
   if (a == null || b == null) return false;
@@ -142,4 +143,3 @@ test(
   ]
 );
 
-