Suppose that an investment has yielded the following historical annual returns for the past $5$ years:

Year $1=13\%$

Year $2=15\%$

Year $3=-7\%$

Year $4=10\%$

Year $5=30\%$

Express your answers to the following questions in percentage terms $($eg$.46\mathrm{.}7\%)$ and round according to the instructions.

What is the arithmetic average annual return for the past $5$ years?

$\%($Round your answer to $1$ decimal place$)$

What is the geometric average rate of return for the past $5$ years $($CAGR$)?$

$\%($Round your answer to $2$ decimal places$).$

What is the standard deviation in returns for the past $5$ years?

$\%($Round your answer to $1$ decimal place$).$