A Hard Days Night $($HDN$)$ has a capital structure that is based on $45$ percent debt, $10$ percent preferred stock, and $45$ percent common stock. The cost of debt is $4\mathrm{.}8$ percent, the cost of preferred is $8\mathrm{.}4$ percent, and the cost of common stock is $13\mathrm{.}9$ percent. The tax rate is $21$ percent. What is the WACC for HDN$?$

Multiple Choice

$8\mathrm{.}801\%$

$7\mathrm{.}961\%$

$9\mathrm{.}351\%$

$13\mathrm{.}9\%$