A satellite with a mass of 5.0 × 10⁶ kg is moving at a speed of 2.5 × 10⁶ m/s. Due to a major technical issue, the satellite explodes into 3 fragments. One of the fragments with a mass of 7.5 × 10⁵ kg continues forward at a speed of 1.5 × 10⁶ m/s. The second fragment moves in the backward direction at a speed of 0.5 × 10⁶ m/s. Find the speed and direction in which the third fragment moves, if the mass of the second fragment is 6.0 × 10⁵ kg.