An ice skater with an initial rotational inertia of 4 kgm2 redistributes his mass so that his rotational inertia is now 0.5 kgm2. If his initial angular speed was 3 revolutions per second, calculate his new angular speed. Then, draw a diagram that shows him in these two different configurations. Label each configuration with the rotational inertia, angular speed, and angular momentum of the ice skater. Finally, state whether or not the ice skater is an isolated system.