Beta of common stock $=1\mathrm{.}4$

Treasury bill rate $=4\%$

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

Yield to maturity on long$-$term debt $=10\%$

Book value of equity $=$ $$360$ million

Market value of equity $=$ $$720$ million

Long$-$term debt outstanding $=$ $$720$ million

Corporate tax rate $=21\%$

What is the company$$s WACC?