Problem 10-7 Calculating Returns and Variability Returns Year Y 12345 14% 18% 28 29 -21 - 26 9 10 10 20 S 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 % %