21. Wallystore has a pre-tax cost of debt of 5.5 percent and a cost of equity of 14 percent and. The debt-equity ratio is 0.7 and the tax rate is 30 percent. What is Wallystore's unlevered cost of capital? A. 10.72 percent B. 11.85 percent C. 14.29 percent D. 14.46 percent E. 15.08 percent