Problem $12-14$ Calculating Returns and Variability $($LO$1)$

You find a certain stock that had returns of $9\mathrm{.}4\%,-16\mathrm{.}4\%,21\mathrm{.}4\%,$ and $17\mathrm{.}4\%$ for four of the last five years. The average return of the stock over this period was $10\mathrm{.}7\%.$ Assume the face value of the bond is $$1,000.$

What was the stock's return for the missing year? $($Round the final answer to $1$ decimal place.$)$

Stock's return $\%$

What is the standard deviation of the stock's return? $($Do not round intermediate calculations. Round the final answer to $2$ decimal places.$)$

Standard deviation $$