$\displaystyle q= \frac{1}{2}$\displaystyle q= \frac{1}{2}

$\displaystyle q= \frac{1}{6}$\displaystyle q= \frac{1}{6}

$\displaystyle q= \frac{1}{4}$\displaystyle q= \frac{1}{4}

$\displaystyle q= \frac{1}{8}$\displaystyle q= \frac{1}{8}