A firm's total assets are $1067 min. The firm funds the assets with $195 min of debt, $80 min. of preferred stock, and the remainder with common equity. What is the firm's WACC if its pre-tax cost of debt is 5.1%, cost of preferred stock is 8%, cost of common equity is 18.7%, and the tax rate is 17%? Express your answer in %, to the nearest 0.01%; drop the symbol