Pld Company has debt with a yield to maturity of 5.9%, a cost of equity of 12.8%, and a cost of preferred stock of 9.8%. The market values of its debt, preferred stock, and equity are $14.1 million, $2.8 milion, and $16.8 million, respectively, and its tax rate is 35%. 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.)