Twice Shy Industries has a debt−equity ratio of 1.6. Its WACC is 8.6 percent, and its cost of debt is 6.1 percent. The corporate tax rate is 35 percent.   

a. What is the company’s cost of equity capital? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)   (I know this answer is 16%, but I can't seem to get the correct answer for the remaing questions. )

b. What is the company’s 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.)

c1. What would the cost of equity be if the debt−equity ratio were 2? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

c2. What would the cost of equity be if the debt−equity ratio were 1.0? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

c3. What would the cost of equity be if the debt−equity ratio were zero? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)