Write a method that works like a vending machine. You are given a single string that lists a bunch of items available in a vending machine, separated by commas. After each comma there will always be a single space before the next item name starts. There will never be a space before the first item name or after the last one. Items are listed in order of their item number, with the first item being item #1. You also pass 'location' into the method, which indicates which location the item you want is in. Return the name of the item at that location. If 'location' is not a valid location number, return "ERROR". Look at the test data for examples. The only string methods you are allowed to use are .length, .charAt, .substring, .equals, and .compareTo. You are not allowed to use arrays, Maps, Lists, or ArrayLists.