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

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.

a$.$ What is the average annual return?

The average return is $\%.($Round to two decimal places.$)$

Data table shown in picture