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: $35\%$ and cost of $15\mathrm{.}64\%$

Preferred stock: $24\%$ and cost of $10\mathrm{.}19\%$

Debt: $41\%$ and cost of $8\mathrm{.}6\%$ before taxes

What is the adjusted WACC for Lewis if the tax rate is

a$.40\%?$

b$.30\%?$

c$.20\%?$

d$.10\%?$

e$.0\%?$

a$.$ What is the adjusted WACC for Lewis if the tax rate is $40\%?$

$\%($Round to two decimal places.$)$