How does a parabola form from the intersection of a cone and a plane?

For the following parabola, find focus, equation of the directrix, length of the latus rectum, and ends of the latus rectum.

$2{\mathrm{y}}^2=17\mathrm{x}$

Find co-ordinate of focus, equation of directrix, length of latus rectum, and the co-ordinate of endpoints of the latus rectum of the parabola

$5y^2=24x$

Find co-ordinate of focus, equation of directrix, length of latus rectum, and the coordinate of endpoints of the latus rectum of the parabola 

$y^2=-20x$