Rogot Instruments makes fine violins and cellos. It has $1.8 million in debt outstanding, equity valued at $2.5 million, and pays corporate income tax at rate 25%. Its cost of equity is 12% and its cost of debt is 8%. a. What is Rogot's pretax WACC? b. What is Rogot's (effective after-tax) WACC? a. What is Rogot's pretax WACC? Rogot's pretax WACC is \%. (Round to two decimal places.) b. What is Rogot's (effective after-tax) WACC? Rogot's (effective after-tax) WACC is \%. (Round to two decimal places.)