Ursala, Incorporated, has a target debt$-$equity ratio of $\mathrm{.}75.$ Its WACC is $9\mathrm{.}4$ percent, and the tax rate is $23$ percent.

a$.$

If the company$$s cost of equity is $12$ percent, what is its pretax cost of debt? $($Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

b$.$ If instead you know that the aftertax cost of debt is $6\mathrm{.}1$ percent, what is the cost of equity? $($Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$