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Please show the proper excel functions

You've observed the following returns on Crash-n-Burn Computer's stock over the past five years. What is the arithmetic average return? The variance? The standard deviation? Year 1 2 3 4 5 01 WN Returns 7% -13% 21% 34% 15% 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. Arithmetic average return Variance Standard Deviation