a. vvinat is the anthmete average retum over the 10 -year period? b. What is the goometric average retum over the 10 -year period? c. If you invested $100 at the beginning, how much would you have at the end? a. What is the arithmetic average return over the 10-year period? The arithmetic average return over the 10 -year period is \%. (Round to two decimal places.)