Rogot Instruments makes fine violins, violas, and cellos. It has $1.0 million in debt outstanding, equity valued at $2.0 million, and pays corporate income tax at rate 21%. Its cost of equity is 12% and its cost of debt is 7%. a. What is Rogot's pre-tax WACC? b. What is Rogot's effective after-tax) WACC? a. What is Rogot's pre-tax WACC? Rogot's pre-tax 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.)