Problem 12-7 Calculating Returns and Variability (LO1] Year 2 3 Returns X Y 15 % 22% 29 30 10 - 27 10 21 10 5 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 as a percent rounded to 2 decimal places, e.g., 32.16, and round the variance to 5 decimal places, e.g., .16161.) Average returns Variances Standard deviations