The two disks are mounted (similar to a merry-go-round) on low-friction bearings on the same axle and can be brought altogether so that they couple and rotate as one unit. The primary disk, having rotational inertia 2.73 kg•m2 about its central axis, is set spinning counter-clockwise (which might be taken as the positive direction) at 194 rev/min. The second disk, having rotational inertia 5.68 kg•m2 about its central axis, is set spinning counter-clockwise at 690 rev/min. They then couple altogether. (i) Determine their angular speed (rev/min) after coupling? (ii) If rather the second disk is set spinning clockwise at 690 rev/min determine their angular velocity (in rev/min, by using the right sign for direction) after they couple altogether?