Pfd Company has debt with a yield to maturity of 6.2 %, a cost of equity of 14.2 %, and a cost of preferred stock of 8.7 %. The market values of its debt, preferred stock, and equity are $ 11.3 million, $ 2.8 million, and $ 16.5 million, respectively, and its tax rate is 38 %. What is this firm's after-tax WACC? Note: Assume that the firm will always be able to utilize its full interest tax shield. Pfd's WACC is %. (Round to two decimal places.)