Mullineaux Corporation has a target capital structure of 45 percent common stock, 5 percent preferred stock, and 50 percent debt. Its cost of equity is 10.0 percent, the cost of preferred stock is 7.5 percent, and the pretax cost of debt is 4.0 percent. What is the firm's WACC given a tax rate of 35 percent? 6.83 percent 6.47 percent 5.87 percent 5.53 percent 6.18 percent