Question $7(2\mathrm{.}5$ points$)$

You purchased a stock with the following historical returns:

Year $1$: $27\%$

Year $2$: $-12\%$

Year $3$: $18\%$

Year $4$: $10\%$

What was the arithmetic average return on the stock over this four$-$year period?

$14\mathrm{.}00\%$

$11\mathrm{.}50\%$

$9\mathrm{.}50\%$

$10\mathrm{.}75\%$

$17\mathrm{.}50\%$