Two blocks A and B are connected by a cord passing over three pulleys C,D and E. Pulleys C and E are fixed, while D is pulled downward with a constant velocity of 1.5 m/s. At t=0 block A starts moving downward from the position K with a constant acceleration and no initial velocity knowing the velocity of the block A is 6 m/s as it passes through point L, determine the change in elevation, the velocity and the acceleration of block B when A passes thrugh L.