Problem 11-9 The last four years of returns for a stock are as follows: a. What is the average annual return? b. What is the variance of the stock's returns? c. What is the standard deviation of the stock's returns? Average Variance Standard deviation Requirements 1 In cell D13, by using cell references, calculate the average return of the stock (1 pt.). 2 In cell D14, by using the VAR function and cell references, calculate the variance of the stock's returns (1 pt.) 3 In cell D15, by using a cell reference to cell D14, calculate the standard deviation of the stock's returns (1 pt.)