Calculate after$-$tax WACC if the company$$s cost of debt after tax was about $5\mathrm{.}0\%.$

The current risk$-$free rate is $1\mathrm{.}25\%,$ the company$$s Beta is $1\mathrm{.}8$ and the market risk

premium is $8\%.$ Further, the ratio of debt to overall company value is $25\%.$