Problem 12-7 Calculating Returns and Variability (LO1] Returns Year Y 1 19% 15 % 2 22 34 8 14 4 - 15 -20 5 10 24 FNM 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 % %