The last four years of returns for a stock are as shown here: EEB 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? Note: Notice that the average returm and standard deviation must be entered in percentage format. The variance must be entered in decimal format. (Click on the icon located on the top-right corner of the data table below in order to copy its contents into a spreadsheet.) Year Return 2 + 28.4% 3 +12.3% 4 + 4.3% 4.1%