The last four years of returns fot a stock are as shown here: a. What is the average anmul return? b. What is the variance of the stock's retums? c. What is the standard doviation of the stock's returns? Note: Notice that the average return and standard deviation must be entered in percentage format. The variance must be enterud in decimal format. a. What is the average annual return? The average relum is K. (Round to two decimal places.) Data table (Click on the following icon H1 in order to copy its consents into a sprescisheet.)