Using the following returns, calculate the arithmetic average returns, the variances, and the standard deviations for X and Y. Year 1 2 N 3 4 5 X Arithmetic average return Variance Standard Deviation 15% 26% 7% -13% 11% Y Complete the following analysis. Do not hard code values in your calculations. Make sure to use the "sample" Excel formulas in your calculations. You must use the built-in Excel functions to answer this question. X Y 21% 36% 13% -26% 15%