Here is some information about Stokenchurch Incorporated:

Beta of common stock = 2.0
Treasury bill rate = 4%
Market risk premium = 7.3%
Yield to maturity on long-term debt = 10%
Book value of equity = $420 million
Market value of equity = $840 million
Long-term debt outstanding = $840 million
Corporate tax rate = 21%

What is the company’s WACC?
Note: Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.