Here is some information about Stokenchurch Inc: Beta of common stock = 1.5 Treasury bill rate = 4% Market risk premium -6.8% Yield to maturity on long-term debt = 9% Book value of equity - $370 million Market value of equity - $740 million Long-term debt outstanding - $740 million Corporate tax rate - 21% What is the company's WACC? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) . WACC