1. Find parametric and symmetric equations of the line passing through points (1, -3, 2) and (5, -2, 8)

2. Find the distance between point P = (5, -1, 0) and the plane given by 4x+2y-z=3.

3. Find the measure of the angle between planes x+y-z=3 and 3x-y+3z=5.

4. Find parametric equations for the line formed by the intersection of planes x+y-z=3 and 3x-y+3z=5