Joylin, Incorporated, has equity with a market value of $$22\mathrm{.}5$ million and debt with a market value of $$6\mathrm{.}75$ million. Treasury bills that mature in one year yield $5$ percent per year and the expected return on the market portfolio is $12$ percent. The beta of the company$$s equity is $1\mathrm{.}1.$ The company pays no taxes.

a$.$ What is the company's debt$-$equity ratio? $($Do not round intermediate calculations and round your answer to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

b$.$ What is the company$$s weighted average cost of capital? $($Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

c$.$ What is the cost of capital for an otherwise identical all$-$equity company? $($Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$