22. What is the WACC for a firm with 40% debt, 20% preferred stock, and 40% equity if their respective costs are 6% after tax, 12%, and 18% ? The firm's tax rate is 21%. 23. A firm is financed 55% by common stock, 10% by preferred stock, and 35% by debt. The required return is 15% on the common, 10% on the preferred, and 8% on the debt. If the tax rate is 21%, what is the WACC? 24. The weighted-average cost of capital for a firm with a 65/35 debt/equity split, 8% pre-tax cost of debt, 15% cost of equity, and a 21% tax rate is: 25. What is the WACC for a firm with 50% debt and 50% equity that pays 12% on its debt, 20% on its equity, and has a 21% tax rate