Here is some information about Stokenchurch Incorporated:

Beta of common stock $=1\mathrm{.}3$

Treasury bill rate $=4\%$

Market risk premium $=7\mathrm{.}6\%$

Yield to maturity on long$-$term debt $=5\%$

Book value of equity $=$ $$450$ million

Market value of equity $=$ $$900$ million

Long$-$term debt outstanding $=$ $$900$ 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.