Year 1 2 3 4 5 Returns Y 16 % 20% 19 31 10 15 8 17 10 21 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.) Y % % Average returns Variances Standard deviations % %