A firm uses a target capital structure of $25\%$ debt, $15\%$ preferred equity and $60\%$ common equity. If the cost of debt is $4\mathrm{.}4\%,$ the cost of

preferred equity is $9\%,$ and the cost of equity is $11\mathrm{.}9\%,$ what is the firm's overall cost of funding?

$8\mathrm{.}91\%$

$10\mathrm{.}19\%$

$9\mathrm{.}59\%$

$9\mathrm{.}01\%$

none of these