Use the following returns for X and Y. Returns Year 1 2 3 nmt X 22.9% 17.9 10.9 21.8 Y 29.7% - 4.9 31.7 -16.8 35.7 5.9 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.) % Average return b. Variance Standard deviation