Problem 8-05 Two investments generated the following annual returns: Investment X Investment Y 20x0 13% 17 % 20X1 24 20X2 18 20x3 14 20X4 12 a. What is the average annual return on each investment? Round your answers to one decimal place. The average annual rate of return on X: % The average annual rate of return on Y: b. What is the standard deviation of the return on investments X and Y? Round your answers to two decimal places. Standard deviation of X: Standard deviation of Y: c. Based on the standard deviation, which investment was riskier? -Select- Awas riskier