PDF company has debt with a yield to maturity of 6.2, a cost of equity of 13.4% and a cost of preferred stock of 9.2% the market values of its debt, preferred stock, and equity are $15.1 million and $3.3 million and $13.7 respectively and it's tax rate is 22% what is this firms after-tax WACC?

assume that the firm will always be able to utilize it's full interest tax shield

PDFS WACC IS ___% please round to two decimal places