Two investments generated the following annual returns: Investment Y 16% 28 20x0 20x1 20X2 20x3 20X4 Investment X 15% 21 34 20 12 15 15 14 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- was riskier