The last four years of returns for a stock are as shown here:

Year	1	2	3	4
Return	-4.1%	+28.3%	+11.6%	+4.4%

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.

The average return is 10.05%. (Round to two decimal places.) The variance of the returns is 0.01892. (Round to five decimal places.) The standard deviation is 13.75%. (Round to two decimal places.)

Please provide steps for how to get these answers. thank you!