19.9% 16.6% 18.0% 50.0% 43.3% 1.2% 16.5% 45.6% 45.2% 3.0% a. What is the arithmetic average return over the 10-year period b. What is the geometric average return over the 10-year period? c. If you invested $100 at the beginning, how much would you have at the end?