Debreu Beverages has an optimal capital structure that is 50% common equity, 40% debt, and 10% preferred stock. Debreu's pretax cost of equity is 12%....

Debreu Beverages has an optimal capital structure that is 50% common equity, 40% debt, and 10% preferred stock. Debreu's pretax cost of equity is 12%. It's pretax cost of preferred equity is 7%, and it's pretax cost of debt is also 7%. If the corporate tax rate is 35%, what is the weighed average cost of capital?a)