Using the following returns, calculate the arithmetic average returns, the variances, and the standard deviations for X and Y. Year 1 2. 3 4 5 Returns Y 13 % 18 % 31 39 20 -9 -21 -23 22 47 Requirement 1: (a) Calculate the arithmetic average return for X. 13.00% 4 (b) Calculate the arithmetic average return for Y. (Click to select) Requirement 2: (a) Calculate the variance for X. (Do not round intermediate calculations.) 0.040250 (b) Calculate the variance for Y. (Do not round intermediate calculations.) (Click to select) - Requirement 3: (a) Calculate the standard deviation for X. (Do not round intermediate calculations.) 20.06% . (b) Calculate the standard deviation for Y. (Do not round intermediate calculations.) (Click to select)