10. (a) Obtain parametric equations for the line passing through the points A(12, 5, 11) and B(-18, 10, 1). 1 mark (b) Find the Cartesian equation of the plane 1 that contains the points 4 marks P(4, 12, 5), Q (5, 10, 4) and R(10, 4, 0) (c) Find the angle between plane 1 and plane 2: -3x + 2y + 4z = 5. 2 marks (d) Find the point of intersection between the line in (a) and plane 1. 3 marks