Suppose that hanna nails, incorporated's capital structure features 45 percent equity, 55 percent debt, and that its before-tax cost of debt is 5 percent, while its cost of equity is 9 percent. If the appropriate weighted average tax rate is 21 percent, what will be hanna nails' wacc? multiple choice 5. 18 percent 6. 22 percent 6. 72 percent 6. 80 percent