Question 38 (2 points) Listen If a firm's weight of debt, preferred stock and common stock are equal, the pretax cost of debt is 5%, the cost of preferred stock is 2% higher than the pretax cost of debt, and the cost of common stock is 4% higher than the cost of preferred stock, what is the firm's WACC if its marginal tax rate is 30%? 6.83% 07.17% 7.99% 8.43% 9.01%