$10\mathrm{.}6$

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: $45\%$ and cost of $16\mathrm{.}64\%$

Preferred stock. $18\%$ and cost of $11\mathrm{.}97\%$

Debt: $37\%$ and cost of $8\mathrm{.}9\%$ before taxes

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

a$.40\%?$

b$.30\%?$

c$.20\%?$

d$.10\%?$

e$.0\%?$