Two blocks A and B with mA = 2.1 kg and me = 0.71 kg are connected by a string of negligible mass. They rest on a frictionless horizontal surface. You pull on block A with a horizontal force of 6.8 N. (a) Find the magnitude of the acceleration (in m/s2) of the blocks. m/s (b) Determine the tension (in N) in the string connecting the two blocks. N (c) How will the tension in the string be affected if ma is increased? O increase O decrease O remain the same