Using the following returns, calculate the arithmetic average returns, the variances, and the standard deviations for X and Y Returns 13% 20 Year 18% 39 -9 2 3 4 5 -21 -23 47 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)