8-0 Two investments generated the following annual returns: Investment X Investment Y 20X0 10% 20X1 16 20X2 24 20X3 21 20X4 9 22392 24% 26 13 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: 16 % 18.8 % 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 riskler? Investment Y was riskier.