Problem B-U5 Two investments generated the following annual returns: Investment X 11% 20x0 16 Investment Y 20% 20 11 11 20X1 20x2 20x3 20X4 22 15 9 20 % 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