b) Let l1 and l, be lines in 3 space such that 4 passes through the point with coordinates (3, 4, 5) in the direction of 2. 1. • 12 passes through the points with coordinates (8, 0, 1) and (8, 0, -1)...

Extracted text: b) Let l1 and l, be lines in 3 space such that 4 passes through the point with coordinates (3, 4, 5) in the direction of 2. 1. • 12 passes through the points with coordinates (8, 0, 1) and (8, 0, -1) Write down the equations of l and l2 in parametric as well as Cartesian forms. c) Let l and l, be as above. Describe precisely the intersection l12 and justify your answer.