Pid Company has debt with a yield to maturity of 6.6%, a cost of equity of 14.2%, and a cost of preferred stock of 10.5%. The market values of its debt, preferred stock, and equity are $12.6 million, $3.4 million, and $15.3 million, respectively, and its tax rate is 35%. What is this firm's after-tax WACC? Pfd's WACC is %. (Round to two decimal places.)