Ursala, Incorporated, has a target debt$-$equity ratio of $1\mathrm{.}50.$ Its WACC is $8$ percent and the tax rate is $23$ percent.

If the company$$s cost of equity is $11\mathrm{.}9$ percent, what is its pretax cost of debt?

If instead you know that the aftertax cost of debt is $4\mathrm{.}1$ percent, what is the cost of equity?