The 9-ft steel beam is being hoisted from its horizontal position by the two cables atta...

The 9-ft steel beam is being hoisted from its horizontal position by the two cables attached at A and B. If the initial angular accelerations are determine the initial values of (a) the angular acceleration of the beam, (b) the acceleration of point C, and (c) the distance d from A to the point on the centerline of the beam which has zero acceleration.