Solve the below problem:
Q: At the instant shown, slider block B is moving to the right with a constant acceleration, and its speed is 6 in./s. Knowing that after slider block A has moved 10 in. to the right its velocity is 2.4 in./s, determine
(a) The accelerations of A and B,
(b) The acceleration of portion D of the cable,
(c) The velocity and the change in position of slider block B after 4s.