(2) Find an equation of the plane that (a) passes through the point (1, -1, -1) parallel to the plane 5x - y - z = 6. (b) passes through (-1, 1, 1), (0, 1, 2), (3, -2, 3). (c) passes through the point (3, 5, -1) and contains the line x = 4 - t, y = -1 + 2t, z = -3t