How to get questions A- B? thanks

Ten annual returns are listed in the following table: (Click on the following icon in order to copy its contents into a spreadsheet.) - 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? a. What is the arithmetic average return over the 10-year period? The arithmetic average return over the 10-year period is 8.13 %. (Round to two decimal places.)