I'm uming that I do this as an inelastic collision problem but I'm not sure...Can someone help me?

A projectile of m 1.9 kg approaches a stationary target body at 4.9 m/s. The projectile is deflected through an angle of 59.9� and its speed after the collision is 2.9 m/s. What is the magnitude of the momentum of the target body after the collision?