Mega Corporation has the following returns for the past three years: $9$ percent, $8$ percent, and $13$ percent. Use the following formulas to calculate the variance of the returns and the standard deviation of the returns:

Variance $($r$$m$)$

$($

r

~

m

$)$

$=$ expected value of $($r$$m$$rm$)2$

$($

r

~

m

$-$

r

m

$)$

$2$

Standard deviation of r$$m$=$variance$($r$$m$)$

r

~

m

$=$

v

a

r

i

a

n

c

e

$($

r

~

m

$)$

$.$

Multiple Choice

$44\mathrm{.}00$ and $7\mathrm{.}70$ percent

$96\mathrm{.}00$ and $10\mathrm{.}80$ percent

$5\mathrm{.}00$ and $2\mathrm{.}16$ percent

$18\mathrm{.}00$ and $10\mathrm{.}00$ percent