Problem 10-7 Calculating Returns and Variability Returns Year X Y 1 19% 15% 2345 22 34 -15 -20 8 14 10 24 Using the returns shown above, calculate the arithmetic average returns, the variances, and the standard deviations for X and Y. (Do not round intermediate calculations. Enter your average return and standard deviation answers as a percent rounded to 2 decimal places, e.g., 32.16. Enter your variance answers rounded to 5 decimal places, e.g., .16161.) X Y Average returns % % Variances Standard deviations % %