eBook Problem 21-03 A firms current balance sheet is as follows: Assets $ 110 Debt $ 33 Equity $ 77 What is the firms weighted-average cost of capital at various combinations of debt and equity, given the following information? Round your answers to one decimal place. Debt/Assets After-Tax Cost of Debt Cost of Equity Cost of Capital 0 % 7 % 12 % % 10 7 12 % 20 8 12 % 30 9 13 % 40 10 14 % 50 11 14 % 60 11 15 % Construct a pro forma balance sheet that indicates the firms optimal capital structure. Choose the best structure from the options analyzed in part a. Compare this balance sheet with the firms current balance sheet. Round your answers to the nearest dollar. Assets $ 110 Debt $ Equity $ What course of action should the firm take? Round your answer to the nearest whole number. Since the firm is currently using % debt financing, it -Select- at its optimal capital structure and -Select- As a firm initially substitutes debt for equity financing, wh