Returns Year 1 2 3 4 5 22.8% - 17.8 10.8 21.6 5.8 Y 29.4% 4.8 31.4 16.6 35.4 a. Calculate the average returns iSr 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 a. % % Average return Variance b. C. Standard deviation % %