The last four years of retume for a slock are as shown here a. What s the average annual retum? b. What is the variance of the stock's teturng? 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 varlance must be entered in decimal format a. What is the average annual retum? The average retum is h. (Round to two decimal places.) years of returns for a stock are as shown here: the average annual return? the variance of the stock's returns? the standard deviation of the stock's returns? tice that the average return and standard deviation must be entered in percentage format. The variance must be enteredi is the a Data table erage re (Click on the following icon in order to copy its contents into a spreadsheet.)