Suppose that Hanna Nails, Inc.'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 O 6.22 percent O 6.72 percent O 6.80 percent