help!!

Here is some information about Stokenchurch Incorporated: Beta of common stock =1.5 Treasury bill rate =4% Market risk premium =7.8% Yield to maturity on long-term debt =7% Book value of equity =$470 million Market value of equity =$940 million Long-term debt outstanding =$940 million Corporate tax rate =21% What is the company's WACC? Note: Do not round intermediate calculations. Enter your answer as a percent rou WACC