Write a method that returns the sum of the digit in the one's place and the digit in the ten's place of 'num'. For example, if 'num' is 4738 you would return 11 since 8+3=11. The 8 came from the one's place and the 3 came from the ten's place. As a pre-condition, you may assume that 'num' is positive and has at least two digits. You may NOT use any strings or string methods for this problem.