Here is some information about Stokenchurch Incorporated:

Beta of common stock $=2\mathrm{.}2$

Treasury bill rate $=4\%$

Market risk premium $=8\mathrm{.}5\%$

Yield to maturity on long$-$term debt $=8\%$

Book value of equity $=$$$540$ million

Market value of equity $=$$$1,080$ million

Long$-$term debt outstanding $=$$$1,080$ 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.

WACC $,$ W$........................$