Problem 3. (a) Let A(-2, 0, 1), B(1, 1, -1), C(-1, 1, 2). (i) Find an equation for the plane through A, B and C. (ii) Find parametric equations for the line through A and parallel to the line through B and C. (b) Show that the following lines are skew Ll: 2=-1+t, y = 2t, 2=2-t L2: 1=3-8, y= 2s, 2=-1+5