General Forge and Foundry Corporation currently has no debt in its capital structure, but it is considering using some debt and reducing its outstanding equity. The firm's unlevered beta is 1.1, and its cost of equity is 10.70%. Because the firm has no debt in its capital structure, its weighted average cost of capital (WACC) also equals 10.70%. The risk-free rate of interest (TRF) is 3%, and the market risk premium (RP) is 7%. General Forge's marginal tax rate is 35%. General Forge is examining how different levels of debt will affect its costs of debt and equity, as well as its WACC. The firm has collected the financial information that follows to analyze its weighted average cost of capital (WACC). Complete the following table. D/A Ratio E/A Ratio Bond Rating Before-Tax Cost of Debt (ra) Levered Beta (b) D/E Ratio WACC 0.0 1.0 0.00 1.1 Cost of Equity (rs) 10.70% 11.96% 14.06% 10.70% 10.50% 0.2 0.8 0.25 A 7.2% 7.7% 0.4 0.6 0.67 BBB 1.58 0.6 0.4 1.50 BB 8.9% 10.75% 2.17 3.96 0.8 0.2 11.9% 30.72%