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:$29\%$ and cost of $16\mathrm{.}85\%$

Preferred$$ stock:$13\%$ and cost of $10\mathrm{.}77\%$

$$Debt:$58\%$ and cost of $8\mathrm{.}2\%$ before taxes

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

a$.35\%?$

b$.30\%?$

c$.15\%?$

d$.10\%?$

e$.0\%?$