I need to find positive $\displaystyle \varepsilon,\delta$ values satisfying the following three inequalities.

How can use Mathematica to do this?

$\displaystyle 4\varepsilon+2\delta\leq\frac{81}{128}$

$\displaystyle \varepsilon+\delta\leq\frac{1}{6}$

$\displaystyle 2\varepsilon+4\delta>\frac{81}{128}$

Thanks.