Problem 12-7 Calculating Returns and Variability (LO1] Year U AWN- 2 3 4 Returns Y 10% 23% 15 25 9 11 -14 -15 10 15 Using the returns shown above, calculate the arithmetic average returns, the variances, and the standard deviations for and Y. (Do not round intermediate calculations. Enter your average return and standard deviation answers as a percent rounded to 2 decimal places, e.g., 32.16, and round the variance answers to 5 decimal places, e.g., .16161.) Y Average returns % % Variances Standard deviations % %