Williamson Inc. has a debt-to-equity ratio of 2.55. The firm's WACC is 11 percent, and its pre-tax cost of debt is 5 percent. Williamson is subject to a corporate tax rate of 30 percent. (Do not round intermediate calculations. Round the final answers to 2 decimal places.) a. What is Williamson's cost of equity capital? Cost of equity capital b. What is Williamson's unlevered cost of equity capital? Unlevered cost of equity c. What would Williamson's WACC be if the firm's debt-to-equity ratio were 0.85? 1.75? Weighted average cost of capital % Debt-equity ratio 0.85 Debt-equity ratio 1.75