A double pulley is attached to a slider block by a pin at A. The 1.5-in-radius inner pulley is rigidly attached to the 3-in-radius outer pulley knowing that each of the two cords is pulled at a constant speed , determine (a) the instantaneous center of rotation of the double pulley (b) the velocity of th slider block (c) the number of inches of cord wrapped or unwrapped on each pulley per second