4. Lannister Manufacturing has a target debt-equity ratio of 0.61. Its cost of equity is 20 percent, and its cost of debt is 10 percent. If the tax rate is 31 percent, what is the company's WACC?

5.Fama's Llamas has a weighted average cost of capital of 10.5 percent. The company's cost of equity is 15.5 percent, and its pretax cost of debt is 8 percent. The tax rate is 34 percent. What is the company's target debt-equity ratio?