Rogot instruments makes fine violins, violas, and cellos, It has $1.2 milion in debt outstanding, equify valued at $24 milison, and pays corporate income tax at rate 21%. Its cost of equity is 12% and its cost of debt is 8%. a. What is Rogot's pre-tax WACC? b. What is Rogot's (effective after-tax) WACC? a. What is Rogors pre-tax WACC? Rogots pre-tax WACC is \%. (Round to two decimal places.) b. What is Rogot's (elfective after-tax) WACC? Rogot's (effective afler-tax) WACC is \%. (Round to two decimal places.)