Ursala, Incorporated, has a target debt-equity ratio of 1.20 . Its WACC is 8.7 percent, and the tax rate is 22 percent. a. If the company's cost of equity is 13 percent, what is its pretax cost of debt? Note: Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16. b. If instead you know that the aftertax cost of debt is 7.1 percent, what is the cost of equity? Note: Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16