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.$)$

b$.$ What is the variance of the stock's returns?

The variance of the returns is

$($Round to five decimal places.$)$