Three blocks are in contact with each other on a frictionless horizontal surface as shown. A horizontal force of with a magnitude of F = 220 N is applied to block 1. The masses of the blocks are m1 = 2 kg, m2 = 7 kg and m3 = 10 kg. What is the acceleration of the blocks? What is the magnitude of the net force on the middle block? What is the horizontal component of the force of block 2 on block 3?