$\displaystyle \frac{2\sqrt{3}}{15}$\displaystyle \frac{2\sqrt{3}}{15}

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

$\displaystyle \frac{4\sqrt{3}}{15}$\displaystyle \frac{4\sqrt{3}}{15}

$\displaystyle \frac{4}{5}$\displaystyle \frac{4}{5}