Can you please explain how to calculate the average return (for both the Fund and Market) step by step after I already got the values for standard deviation? Thank you!

In a recent 5-year period, mutual fund manager Diana Sauros produced the following percentage rates of return for the Mesozoic Fund. Rates of return on the market index are given for comparison. a. Calculate (a) the average return on both the Fund and the index, and (b) the standard deviation of the returns on each. Note: Do not round intermediate calculations. Round your answers to 2 decimal places. b. Did Ms. Sauros do better or worse than the market index on these measures