A hand pushes three identical bricks as shown

A hand pushes three identical bricks as shown. The bricks are moving to the left and speeding up. System A consists of two bricks stacked together. System B consists of a single brick. System C consists of all three bricks. There is friction between the bricks and the table. In the spaces provided at right, draw and label separate free-body diagrams for systems A and B. The vector representing the acceleration of system A is show n at right. Draw the acceleration vectors for systems B and C using the same scale. Explain. The vector representing the net force on system A is shown at right. Draw the net force vectors for systems B and C using the same scale. Explain. The vector representing the frictional force on system A is shown below. Draw the remaining force vectors using the same scale. Explain how you knew to draw the force vectors as you did.