5. Returns Year X 20 % 30 15 15% 18 9 4 916 10 20 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.) Average return Variance eBook & Resources eBook: 12,2, The Historical Record