12-7 Calculating Returns and Variability [LO1] Year Returns X Y 1 18% 15% 2 21 33 3 12 14 4 14 19 5 10 23 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.)