Arm BC has a mass of 12 kg and the moment of inertia about its center of mass is 3 kg-m2....

Arm BC has a mass of 12 kg and the moment of inertia about its center of mass is 3 kg-m2. At the instant shown, arm AB has a constant clockwise angular velocity of 2 rad/s and arm BC has a counterclockwise angular velocity of 2 rad/s and a clockwise angular acceleration of 4 rad/s2. What are the couple and the components of force exerted on arm BC at B?