$13.$ WACC Ursala, Inc., has a target debt$-$equity ratio of

$\mathrm{.}65.$ Its WACC is $10\mathrm{.}4$ percent, and the tax rate is $23$

percent.

a$.$ If the company$$s cost of equity is $14$ percent,

what is its pretax cost of debt?

$5\mathrm{.}23\%$

b$.$ If the aftertax cost of debt is $5\mathrm{.}8$ percent, what is the cost of equity?

b$.11\mathrm{.}93\%$