Review this situation: Universal Exports Inc. is trying to identify its optimal capital structure. Universal Exports Inc. has gathered the following financial information to help with the analysis. Debt Ratio Equity Ratio 30% 40% 50% 60% 70% 70% 60% 50% 40% 30% 6.02% 6.75% 7.15% 7.55% 8.24% rsWACC 9.40% 9.71% 9.750% 9.55% 10.60% 11.30% 12.80% 10.02% 10.78% 11.45% Which capital structure shown in the preceding table is Universal Exports Inc.'s optimal capital structure? Debt ratio-50%; equity ratio 50% Debt ratio-40%; equity ratio-60% Debt ratio: 30%; equity ratio 70% Debt ratio 60%; equity ratio 40% Debt ratio 70%; equity ratio 30% Consider this case: Globo-Chem Co. currently has a capital structure consisting of 40% debt and 60% equity. However, Globo-Chem Co.'s CFO has suggested that the firm increase its debt ratio to 50%. The current risk-free rate is 3.5%, the market risk premium is 7.5%, and Globo-Chem Co.'s beta is 1.10. If the firm's tax rate is 45%, what will be the beta of an all-equity firm if its operations were exactly the same? Now consider the case of another company: B.C. Robotics Inc. has a current capital structure of 30% debt and 70% equity. Its current before-tax cost of debt is 696, and its tax rate is 45%. It currently has a levered beta of 1.10. The risk-free rate is 3.5%, and the risk premium on the market is 7.5%. 8.. Robotics Inc. is considering changing its capital structure to 60% debt and 40% equity. Increasing the firm's level of debt will cause its before-tax cost of debt to increase to 8%. Use the Hamada equation to unlever and relever the beta for the new level of debt. What will the firm's weighted average cost of capital (WACC) be if it makes this change in its capital structure