Pid Company has debt with a yield to maturity of 7.5%, a cost of equity of 13.9%, and a cost of preferred stock of 9.1%. The market values of its debt, preferred stock, and equity are $13.7 million, $3.1 million, and $15.1 million, respectively, and its tax rate is 35%. What is this firm's 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.)