Rogot Instruments makes fine violins and cellos. It has $1.5 million in debt outstanding, equity valued at $2.2 million and pays corporate income tax at rate 21%. Its cost of equity is 11% and its cost of debt is 6%. 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.)