Use the following returns for X and Y. Returns Year X Y 12345 22.7% 29.1% -17.7 -4.7 10.7 31.1 21.4 -16.4 5.7 35.1 a. Calculate the average returns for X and Y. Note: Do not round intermediate calculations and enter your answers as a percent r b. Calculate the variances for X and Y. Note: Do not round intermediate calculations and round your answers to 6 decimal c. Calculate the standard deviations for X and Y. Note: Do not round intermediate calculations and enter your answers as a percent r X Y a. Average return 8.60 % 14.84 % b. Variance 0.106085 c. Standard deviation 16.33 % 23.64 %