HW ch 12 10 Returns Year X Y 1 16 % 20% 2 1931 3 10 15 4 - 8 - 17 5 10 21 points eBook References 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.) Average returns Variances Standard deviations 11