Dickson, Inc., has a debt-equity ratio of 2.35. The firm's weighted average cost of capital is 12 percent and its pretax cost of debt is 9 percent. The tax rate is 24 percent.

What is the company's cost of equity capital?

What is the unlevered cost of equity capital?

What would the company's weighted average cost of capital be if the company's debt-equity ratio were .75 and 1.35?

Please answer this in Excel, thank you