P12-7 Calculating Returns and Variability (L01) 4 Using the following returns, calculate the arithmetic average returns, the variances, and the standard deviations for X and Y. 25 points Year 1 2 3 4 5 Returns Y 15% 24% 33 45 22 -12 -23 -26 24 53 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)