Returns Year 18% 33 18% 15% 2 2133 3 1419 4 12 14 10 5 23 Using the returns shown above, calculate the arithmetic average return, the variances, and the standard deviations for X 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. Enter your variance answers rounded to 5 decimal places, e.g., 32.16161.) Average returns Variances Standard deviations