Your old toy train from pre-school days consists of three cars: M1 = 0.3 kg, M2 = 0.2 kg, and M3 = 0.1 kg. You pull the cars with a force F = 2 N. If friction can be neglected, what are the tensions in the two ropes A (connecting M1 and M2) and B (connecting M2 and M3)?