Year 1 2 3 4 5 Returns Y 18 % 15 % 21 33 12 14 - 14 19 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 as a percent rounded to 2 decimal places, e.g., 32.16, and round the variance to 5 decimal places, e.g., .16161.) x Y % % Average returns Variances Standard deviations % %