A company's beta is $0\mathrm{.}9,$ the risk$-$free rate is $5\mathrm{.}5$ percent, and an annualized return of the market is $8\mathrm{.}5$ percent. Which of the following is a company's cost of equity using the capital asset pricing model $($CAPM$)$ approach?

$10\mathrm{.}00\%$

$13\mathrm{.}15\%$

$8\mathrm{.}20\%$