1.00 points Problem 12-7 Calculating Returns and Variability LOT Year X 11 % 18% 2526 10 4 -18 23 17 10 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 deviation as a percent rounded to 2 decimal places. e.g.. 32.16, and round the variance to 5 decimal places e.g. 32.16161.) Average returm