Mullineaux Corporation has a target capital structure of 50 percent stock and 50 percent debt. Its cost of equity is 18.8 percent, and its after-tax cost of debt is 7.8 percent. What is the company's WACC if its tax rate is 21 percent? O 12.89 percent 11.45 percent O 13.30 percent O 12.05 percent 13.80 percent