3) Find the distances: a. Between l, = (3 + t, -2 + 3t, -t) and l2 = (1 + 2t, t, 5 + 4t). b. Between the planes 3x - 2y + 3z = 0 and 3x - 2y + 3z = 6. c. From the point (1, 1, 1) to the liner = (2t, -6 - t, 1 - 2t)