Two investments generated the following annual returns: 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? was riskier