Williamson, Inc., has a debt-to-equity ratio of 2.47. The firms weighted average cost of capital is 9 percent, and its pretax cost of debt is 7 percent. Williamson is subject to a corporate tax rate of 40 percent.

a.	What is Williamsons cost of equity capital? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places (e.g., 32.16).)

Cost of equity capital

%

b.	What is Williamsons unlevered cost of equity capital? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places (e.g., 32.16).)

Unlevered cost of equity

%

c.	What would Williamsons weighted average cost of capital be if the firms debt-to-equity ratio were .65 and 1.80? (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places (e.g., 32.16).)

	Weighted average cost of capital
Debtequity ratio .70	%
Debtequity ratio 1.40	%
PLEASE ANSWER ALL Question A, B and C! and please explain how to do this in excel