$\displaystyle \frac{1}{5}$\displaystyle \frac{1}{5}

$\displaystyle \frac{\sqrt{6}}{12}$\displaystyle \frac{\sqrt{6}}{12}

$\displaystyle \frac{5}{24}$\displaystyle \frac{5}{24}

$\displaystyle \frac{2\sqrt{6}}{5}$\displaystyle \frac{2\sqrt{6}}{5}