Rogot Instruments makes fine violins and cellos. It has $1.3 million in debt outstanding, equity valued at $3.1 million, and pays corporate income tax at rate 23%. Its cost of equity is 13% and its cost of debt is 5%. 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.)