#5. Find the vector and parametric equations of each plane: (a) the plane through the origin with direction vectors (3, 2, 1) and (0, l, 2). [2] (b) the plane through the points (1, 3, 2), (0, 1, 2), and (9, 2, 0). [3] (c) the plane with zintercept 4, parallel to the plane x=1+, y=2+3rs, 2:3. [2]