Dusit is financed 33% by debt yielding 8.3%. Investors require a return of 15.3% on Dusit's equity. a. What is the company's weighted-average cost of capital if the corporate tax rate is 21%? b. What would be the company's cost of capital if it were exempted from corporate tax? (For all the requirements, do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) a. b. Weighted-average cost of capital Weighted-average cost of capital :% %