Laurier Corp. has no debt but can borrow at $6\mathrm{.}4\%.$ The firm's WACC is currently $9\mathrm{.}5\%,$ and the tax rate is $35\%.($Do not round intermediate calculations. Enter your answer as a percentage rounded to $2$ decimal places.$)$

a$.$ What is the company's cost of equity?

Cost of equity

$\%$

b$.$ If the firm converts to $25\%$ debt, what will its cost of equity be$?$

Cost of equity

$\%$

c$.$ If the firm converts to $50\%$ debt, what will its cost of equity be$?$

Cost of equity

$\%$

d$-1.$ If the firm converts to $25\%$ debt, what is the company's WACC?

WACC $\%$

d$-2.$ If the firm converts to $50\%$ debt, what is the company's WACC?

WACC

$\%$