Kilroy's has a debt$-$equity ratio of $0\mathrm{.}6$ and a tax rate of $35$ percent. The firm does not issue preferred stock. The cost of equity is $14\mathrm{.}5$ percent and the after$-$tax cost of debt is $3\mathrm{.}11$ percent. What is the weighted average cost of capital?

Group of answer choices

$10\mathrm{.}62\%$

$10\mathrm{.}86\%$

$9\mathrm{.}95\%$

$10\mathrm{.}23\%$