answer both questions, including question 1 - part a,b, c and question 2 - part a, b, c, d.

The last four years of returns for a stock are as follows: 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? a. What is the average annual return? The average return is \%. (Round to two decimal places.) Consider the following five monthly returns: a. Calculate the arithmetic average monthly return over this period and express your answer as a percentage per month. b. Calculate the geometric average monthly return over this period. c. Calculate the monthly variance over this period. d. Calculate the monthly standard deviation over this period. a. The arithmetic average is %. (Round to two decimal places.)