Problem 12-7 Calculating Returns and Variability (LO1 Y Year 1 2 Returns X 10 % 15 % 24 25 14 - 17 -22 10 16 10 4 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