please help?

The last four yoars of relums for a stock are as shown hore a. What is the avecage annual feturn? b. What is the variance of the-stock's returns? c. What is the standard devation of the stock's roturns? Noter. Notice that the average return and standard devation must bo entered in percentage focmat. The variance must be enteegd in decirsas karmint a. What is the average annual return? The average return is 16. (Round to two decurnal places.) Data table (Cick on the tollowing icoes or in order to copy its contents into a spreadsheet)