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: 27% and cost of 14.05% Preferred stock: 21% and cost of 10.53% Debt: 52% and cost of 8.2% before taxes What is the adjusted WACC for Lewis if the tax rate is a. 35%? b. 30%? c. 15%? d. 5%? e. 0%