Add passing code for 'able to add an item anywhere in an array'
Add passing code for 'able to count the occurences of an item in an array'
Add passing code for 'able to square each number in an array'
Add passing code for 'able to find all occurences of an item in an array'
Add passing code for 'able to find duplicates in an array', although I still need more practice with find duplicates and determine the location of an item in an array