Starset, Incorporated, has a target debt$-$equity ratio of $0\mathrm{.}73.$ Its WACC is $11\mathrm{.}5$ percent, and the tax rate is $34$ percent.

If the company's cost of equity is $15\mathrm{.}5$ percent, what is the pretax cost of debt?

Cost of debt

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

Cost of equity