Use the following returns for X and Y. Returns Year mtu X 22.3% 17.3 10.3 20.6 5.3 Y 27.9% - 4.3 29.9 15.6 33.9 a. Calculate the average returns for X and Y. (Do not round intermediate calculi and enter your answers as a percent rounded to 2 decimal places, e.g., 32.1 b. Calculate the variances for X and Y. (Do not round intermediate calculations 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 plac