AllCity, Inc., is financed 37% with debt, 7% with preferred stock, and 56% with common stock. Its pretax cost of debt is 6.4%, its preferred stock pays an annual dividend of $2.52 and is priced at $26. It has an equity beta of 1.13. Assume the risk-free rate is 1.8%, the market risk premium is 7.1% and AllCity's tax rate is 25%. What is its after-tax WACC? Note: Assume that the firm will always be able to utilize its full interest tax shield. The WACC is %. (Round to two decimal places.)