Please help with the questions and interpret the graph

Elastic Collision between carts of different masses with equal but ELASTIC COLLISION, M2 = 2 X M1, V2 = -V1 2.0 CART 2 Distance (m) CART 1 - 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Time(s ) 0.8 Cart 1 0.6 0.4 0.2 0.0 -0.2 -0.4 Velocity (m's) -0. -0.8 Cart 2 -1.0 -1.2 -1.4 -1.6 1.8 20 opposite velocities. M,=0.150 kg, M2=0.300 kg 1. Approximately what is the momentum of cart 1 before the collision? +/- kg.m/s. 2. Assuming that the cart 1 has a mass of 0.150 kg and cart 2 has a mass of 0.300 kg, what is the total momentum of the system before the collision? +/- kg.m/s 3. With the same assumptions, what is the total momentum of the system after the collision? +/- kg.m/S. 4. Was momentum conserved in this example? ELASTIC COLLISION M2 = M1 = 1 kg, V1 = 1 m/s, V2 = 0 m/s 2.0 CART 2 1.0 Distance (m) CART L 0.0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Time(s ) 1.0 . T T II. A collision between two carts, with Cart 2 initially at rest. 5. At approximately what time does the collision take place? _+/- _ S . 6. Approximately what is the length of time during which the two carts are in contact? +/- S. 7. Assume that the mass of cart 1 is again 0.150 kg, estimate the mass of cart 2 for this collision? +/- kg