$\displaystyle m=- \frac{5}{4}$\displaystyle m=- \frac{5}{4}

$\displaystyle m= \frac{2}{3}$\displaystyle m= \frac{2}{3}

$\displaystyle m= \frac{11}{4}$\displaystyle m= \frac{11}{4}

$\displaystyle m= \frac{10}{3}$\displaystyle m= \frac{10}{3}