Mechanical engineering, engineering homework help

In a steady, incompressible and fully developed flow between two parallel plates where the top plate is moving and bottom plate is stationary, the velocity field can be represented as V= (Vy/d) i. V is the velocity of the top plate, d is the gap between two plates and y is the distance from the bottom plate toward the top plate. If the flow is rotational how much is the absolute (without ‘+’or ‘-’ sign) angular velocity in rad/s when the top plate is moving at a velocity 93.6 m/s and the gap between the plate is 0.88 m?