Problem 10-7 Calculating Returns and Variability Returns Year 1 Y 15% 22% 2345 29 30 -22 -27 10 10 10 21 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.) Average returns Y % % Variances Standard deviations % %