1. The line of intersection of the planes 2x+y-3z=3 and x-2y+z=-1 is L. If L meets the xy plane at Point A and the z-axis at Point B, determine the length of line segment AB.
2. Determine the Cartesian equation of the plane that is parallel to the line with equation x = -2y = 3z and that contains the line of intersection of the planes with equation x-y+z=1 and 2y-z=0
Thanks, any help is greatly appreciated!