Calculate the opportunity cost of capital (WACC) for a firm with the following capital structure: 50% in debt, 9% in preferred stock, and the remaining fraction in equity. The firms has a cost of debt of 8.88%, a cost of preferred stock equal to 10.83% and a 14.57% cost of common stoch The firm has a 22% tax rate. You answer should be entered as a %, for example 15.48%