Using the following returns, calculate the arithmetic average returns, the variances, and the standard deviations for X and Y Returns Year 2 4 20 % 8% 26 15 -16 17 -7 21 49 Requirement 1 (a) Calculate the arithmetic average return for X (Click to select) (b) Calculate the arithmetic average return for Y (Click to select) Requirement 2 (a) Calculate the variance for X. (Do not round intermediate calculations.) (Click to select) (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.) (Click to select) (b) Calculate the standard deviation for Y. (Do not round intermediate calculations.) (Click to select)