Using the following returns, calculate the arithmetic average returns, the variances, and the standard deviations for X and Y. Requirement 1: (a) Calculate the arithmetic average return for X. (b)Calculate the arithmetic average return for Y. Requirement 2: (a)Calculate the variance for X. (Do not round intermediate calculations.) (b)Calculate the variance for Y. (Do not round intermediate calculations.) Requirement 3: (a) Calculate the standard deviation for X. (Do not round intermediate calculations.) (b)Calculate the standard deviation for Y. (Do not round intermediate calculations.)