Williamson, Inc., has a debt-equity ratio of 2.6. the company's weighted average cost of capital is 9 percent, and its pretax cost of debt is 7 percent. the corporate tax rate is 40 percent.

What is the company's cost of equity capital? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

What is the company's unlevered cost of equity capital? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

What would the company's weighted average cost of capital be if the company's debt-equity ratio were .80 and 1.80? (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.)