20. Pld Company has debt with a yield to maturity of 7.1%, a cost of equity of 15.5%, and a cost of preferred stock of 9.1%. The market values of its debt , preferred stock, and equity are $13.8 million $3.1 million, and $15.2 million, respectively, and its tax rate is 21%. What is this firm's after-tax WACC? Note: Assume that the firm will always be able to utilize its full interest tax shield ... Pld's WACC is %. (Round to two decimal places.)