Returns Year x Y 1 15 % 22 % 2 29 30 3 10 10 4 - 22 -27 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.) X Y % % Average return Variance Standard deviation E % %