Tech Company's cost of common stock is 16% (re), it's before tax cost of debt is 12% (ra). The company operates at its optimal capital structure and the balance sheet looks as follows: Total Assets $2.880 Liabilities and Equity Long-term debt Common equity Total Liabilities and Equity $1,152 $1.728 $2.880 What is Tech's WACC if its tax rate is 40% and it uses only internal capital? 14.40% 10.56% None of the answers is correct 12.48% 11.20%