You've observed the following returns on Mary Ann Data Corporation's stock over the past five years: 42.50 percent, 24.50 percent, 27.50 percent, -29.50 percent, and 16.50 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 16.00 % b-1. 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 0.074431 b-2. What was the standard deviation? (Do not round intermediate calculations. Round the final answer to 2 decimal places.) Standard deviation 27.28 % Suppose a stock had an initial price of $102 per share, paid a dividend of $2.45 per share during the year, and had an ending share price of $114. Compute the percentage total return. (Do not round intermediate calculations. Round the final answer to 2 decimal places.) Percentage of total return 14.45 % Year 1 2 3 4 5 Returns X y 16% 20% 19 31 8 - 17 19 15 10 21 Using the returns shown above, calculate the average returns, variances, and standard deviations for X and Y. (Do not round intermediate calculations. Round the final percent answers to 2 decimal places. The variances to 5 decimal places.) Average returns Variances Standard deviations