$3$M$$s capital structure consists of $35\%$ debt and $65\%$ equity. the after$-$tax cost of debt for the company is $7\mathrm{.}5\%,$ and the cost of equity is $12\%.3$M$$s weighted average cost of capital is equal to which of the following?

$10\mathrm{.}43\%$

$9\mathrm{.}75\%$

$9\mathrm{.}08\%$