I don't understand this question. Could you help me with it. #1

AP Physics 1: Dynamics, Review ( Non - Equilibrium ) (.) two blocks of masses 4 kg and 6 kg respectively, rest on a frictionless surface and are attached by a string. A second string, attached only to the 6 kg block has a horizontal force of 20 N applied to It, causing both blocks to accelerate. What Is the tension In the string between the blocks? For the went sed of p A student ed mus a The edender's some 6 kg. 4 kg 20 N. (9)This A. 12 N B. 28 N C. 8 N D. 10 N E. none of the above The following statements (@ through b .) refer to this set of crates being pulled along a horizontal surface with friction. .. T1 1 kg 2kg 3 kg The tension T2 can never be greater than.T1. A. True B. False The tension T1 can never be greater than F. True B. False