taking a final in a few days please help me with my extra practice so im resdy!

Shi Import-Export's balance sheet shows $300 million in debt, $50 million in preferred stock, and $250 million in total common equity. Shi's tax rate is 25%, rd =6%,rps=5.8%, and rs=12%. If Shi has a target capital structure of 20% debt, 5% preferred stock, and 75% common stock, what is its WACC? A