A projectile of 1.0-kg m approaches a stationary body of 4.9 kg at 13.0 m/s and, after colliding .....?

A projectile of 1.0-kg m approaches a stationary body of 4.9 kg at 13.0 m/s and, after colliding, rebounds in the reverse direction along the same line with a speed of 5.3 m/s. What is the speed of the 4.9-kg body after the collision? (in m/s)