Could you please show me how to get these answers using a financial calculator as well if possible?

12. Mullineaux Corporation has a target capital structure of 41 percent common stock, 4 percent preferred stock, and 55 percent debt. Its cost of equity is 18 percent, the cost of preferred stock is 6.5 percent, and the pretax cost of debt is 8.5 percent. What is the firm's WACC given a tax rate of 39 percent? A. 9.87 percent B. 10.43 percent C. 10.49 percent D. 13.38 percent E. 15.17 percent