12-7 Calculating Returns and Variability [LO1] Year 12345 Returns X 100 15914 10 Y 23% 25 11 -15 15 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, and round the variance answers to 5 decimal places, e.g., 16161.) Average returns Variances Standard deviations X 402.00% 130.30200 1,141.00 % Y 7.25 % 233.38260 1,528.00 %