Use the following returns for X and Y. Returns Year 1 NM 22.8% 17.8 10.8 21.6 5.8 Y 29.4% 4.8 31.4 - 16.6 35.4 3 4 5 a. Calculate the average returns for X and Y. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) b. Calculate the variances for X and Y. (Do not round intermediate calculations and round your answers to 6 decimal places, e.g., 32.161616.) c. Calculate the standard deviations for X and Y. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) Y 8.64 % 14.96 % a. Average return b. Variance C. Standard deviation % %