Calculate the sum of cubes. If the input is x, the sum of cubes is equal to: 13 + 23 + ... + x3 Take input for the number of cubes to sum. No error checking is needed. Specifically, you may assume that the input is always a positive integer Here are some sample runs: Enter how many cubes to sum: 1 1 Enter how many cubes to sum: 3 36 Enter how many cubes to sum: 4 100 Enter how many cubes to sum: 2 9