Vafeas Inc.$\text{'}$s capital structure consists of $80\%$ debt and $20\%$ common equity, it has a beta of $1\mathrm{.}60,$ and its tax rate is $35\%.$ However, the CFO thinks the company has too much debt, and he is considering moving to a capital structure with $40\%$ debt and $60\%$ equity. The risk$-$free rate is $5\mathrm{.}0\%$ and the market risk premium is $6\mathrm{.}0\%.$ By how much would the firm's cost of equity change as a result of altering its capital structure?