Year 1 2 3 4 5 Returns Y 12 % 18 % 26 27 12 10 19 -24 10 18 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 % %