1. A line, passing through point (6, 4, 2), is perpendicular to the Jay-plane. Find a point on this line at a distance of 10 units from point {0. -4, ID). 2. Consider points 0(0, 0, O) and A(0. 0, 3). Show that the set of all points P such that ZiOPl = |AP| is a sphere. Find its center and radius. 3. GivefDescribe a generator, a directrix and the rulings of the cylinder 3: = v' 22. Draw a sketch of the cylinder. 4. Give an equation of the surface of revolution generated by revolving x = v4 2:2 about the z-axis