Adjusted WACC. Lewis runs an outdoor adventure company and wants to know what effect a tax change will have on his company's WACC. Currently, Lewis has the following financing pattern: Equity: 25% and cost of 21.59% Preferred stock: 16% and cost of 15.73% Debt: 59% and cost of 13.3% before taxes What is the adjusted WACC for Lewis if the tax rate is a. 35%? b. 25%? c. 15%? d. 10%? e. 0%