Problem 12-7 Calculating Returns and Variability [LO1] Returns Year X Y 1 16% 22% 2345 30 31 11 12 -23 10 -28 22 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, and round the variance answers to 5 decimal places, e.g., .16161.) X Y Average returns % % Variances Standard deviations % %