Mullineaux Corporation has a target capital structure of 62 percent common stock, 7 percent preferred stock, and 31 percent debt. Its cost of equity is 14.2 percent, the cost of preferred stock is 7.2 percent, and the cost of debt is 8.9 percent. The relevant tax rate is 30 percent. What is Mullineaux%u2019s WACC? What is the aftertax cost of debt?