The last four years of returns for a stock are as shown here: 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 return and standard deviation must be entered in percentage format. The variance must be entered in decimal format. 1 Data Table X (Click on the icon located on the top-right corner of the data table below in order to copy its contents into a spreadsheet.) 3 4 Year Return 1 -3.5% 2 + 28.3% +11.5% +3.8%