Determine whether the lines are parallel, intersecting, or skew. If they are intersecting, find the point of intersection: a) L: x = y - 1 = -z and L: x - 2 = - y = b) L:3x = y + 1 = 2z and L: x = 6 + 2t, y = 17+ 6t, z = 9+ 3t