Use the following returns for X and Y. Returns Year X 21.1% - 16.1 24.3% - 31 2 263 4 18.2 4.1 - 13,2 30.3 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. 3216.) b. Calculate the variances for X and Y. (Do not round Intermediate calculations and round your answers to 6 decimal places, e... 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.) % a. b. c. Average return Variance Standard deviation %