P12-7 Calculating Returns and Variability (LO1) 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 UWN- Returns 8% 25% 26 46 15 -10 -16 17 54 -24 Requirement 1: (a)Calculate the arithmetic average return for X. 10.00% (b)Calculate the arithmetic average return for Y. 18.20% 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