Shadow Corp. has no debt but can borrow at 6.4 percent. The firm's WACC is currently 8.2 percent, and the tax rate is 23 percent. a. What is the firm's cost of equity? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. If the firm converts to 35 percent debt, what will its cost of equity be? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) c. If the firm converts to 50 percent debt, what will its cost of equity be? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) d-1. If the firm converts to 35 percent debt, what will the company's WACC be? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) d-2. If the firm converts to 50 percent debt, what will the company's WACC be? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)