Year 1 2. 3 4 5 Returns X 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., 32.16161.) Y % % Average return Variance Standard deviation % %