How do I solve these problems?

Two boxes are at rest side by side. Mass 1 is 20.0 kg. and mass 2 is 15.0 kg. You applied a force of 215 N on mass 1 for 5. D seconds. Assume no frictions. Determine: 1) the acceleration: 2) the force of mass 1 applies on mass 2; 3] the velocity at the end of 5.0 seconds. Please include a FBD. Question 3 [5 points] In the following diagram the bottom block is being pulled downward with a force of 15 N. Calculate the tension in rope A if the mass of the top block is 2.0 kg and the mass of the bottom block is 5.0 kg. rope- m3 A 156 g hockey puck is initially travelling with a speed of 18 m/s[forward]. The force of friction acting on the puck is 0.30 N. No other applied force other than the normal and the gravity. Assume that the ice is level. how far will it slide before coming to rest