Three blocks are located on a horizontal frictionless table. They are connected by a massless cord, as shown in the figure, and pulled to the right. The masses of the three blocks are m1 = 22 kg, m2 = 14 kg, and m3 = 25 kg. The pulling force is equal to T3 = 21 N.
a) What is the acceleration of the system?
b) What is the tension T1?
c) What is the tension T2?