Braxton Corp. has no debt but can borrow at 6.4 percent. The firms WACC is currently 10.2 percent, and the tax rate is 35 percent. a. What is the companys cost of equity? b. If the firm converts to 25 percent debt, what will its cost of equity be? c. If the firm converts to 50 percent debt, what will its cost of equity be? d. What is the companys WACC in part (b)? In part (c)?