You've observed the following returns on Mary Ann Data Corporation's stock over the past five years: 43.50 percent, 25.50 percent, 28.50 percent. -30.50 percent, and 17.50 percent. a. What was the arithmetic average return on Mary Ann's stock over this five-year period? (Do not round intermediate calculations. Round the final answer to 2 decimal places.) Arithmetic average return 0.17 % - What was the variance of Mary Ann's returns over this period? (Do not round intermediate calculations. Round the final answer to 6 decimal places) Variance 0033731 5-2 What was the standard deviation? (Do not round intermediate calculations. Round the final answer to 2 decimal places.) Standard deviation 3.37