The last four years of returns for a stock are as shown here a. What is the average annual retum? b. What is the variance of the stock's returns? c. What is the standard deviation of the stock's returns? Note Notice that the average return and standard deviation must be entered in percentage format. The variance must be entered in decimal format 5 Untitled - Notepad File Edit Format View Help Year 1 Return (%) -3.6 2 28.3 3 11.8 4 4.2