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: $42\%$ and cost of $17\mathrm{.}09\%$Preferred stock: $13\%$ and cost of $11\mathrm{.}74\%$ Debt: $45\%$ and cost of $9\mathrm{.}8\%$ before taxesWhat is the adjusted WACC for Lewis if the tax rate is a$.40\%?$ b$.30\%?$C$\mathrm{.}20\%?$ d$.5\%?$ e$.0\%?$