A Hard Days Night $($HDN$)$ has a capital structure that is based on $43$ percent debt, $7$ percent preferred stock, and $50$ percent common stock. The cost of debt is $5\mathrm{.}1$ percent, the cost of preferred is $8\mathrm{.}3$ percent, and the cost of common stock is $12\mathrm{.}7$ percent. The tax rate is $21$ percent. What is the WACC for HDN$?$