Crank CB oscillates about C through a limited arc, causing crank OA to oscillate about O. When the linkage passes the position shown with CB horizontal and OA vertical, the angular velocity of CB is 2 rad/s counterclockwise. For this instant, determine the angular velocities of OA and AB. (20 marks) y A 100 mm ΓΑΒ C 75 mm 50 mm B WCB x Ο 250 mm