A company is 45% financed by risk-free debt. The interest rate is 10%, the expected market risk premium is 8%, and the beta of the company's common stock is .55. a. What is the company cost of capital? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) Cost of capital b. What is the after-tax WACC, assuming that the company pays tax at a 34% rate? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) After-tax WACC