Colliisons in two Dimensions ...plz help?

Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Object A has a m of mA = 16.7 kg and an initial velocity of v0A = 7.75 m/s, due east. Object B, however, has a m of mB = 28.9 kg and an initial velocity of v0B = 5.12 m/s, due north. Find the (a) magnitude and (b) direction of the total momentum of the two-object system after the collision.