3.) Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, with rotational inertia 3.30kgm2 about its central axis, is set spinning counterclockwise at 450rev/min. The second disk, with rotational inertia 6.60kgm2 about its central axis, is set spinning counterclockwise at 900rev/min. They then couple together. (a) What is their angular speed after coupling? If instead the second disk is set spinning clockwise at 900rev/min, what are their (b) angular speed and (c) direction of rotation after they couple together