Problem 12-7 Calculating Returns and Variability (L01) Year 1 2 3 4 5 Returns Y 19 % 15 % 22 34 8 14 - 15 - 20 10 24 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 % % Average return Variance Standard deviation % %