Returns YearX 16% 19 20 % 31 2 3 817 4 10 5 10 15 21 Using the returns shown above, calculate the arithmetic average return, 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. Enter your variance answers rounded to 5 decimal places, e.g., 32.16161.) Average returns Variances Standard deviations