Block A, with a Mass of 4

Multiple Choice

Block A, with a mass of 4.0 kg, is moving with a speed of 2.0 m/s while block B, with a mass of 8.0 kg, is moving in the opposite direction with a speed of 3.0 m/s.The center of mass of the two-block system is moving with the velocity of:

A) 1.3 m/s in the same direction as A
B) 1.3 m/s in the same direction as B
C) 2.7 m/s in the same direction as A
D) 1.0 m/s in the same direction as B
E) 5.0 m/s in the same direction as A