The figures above show three stages of a dive performed by an athlete. During the dive, the athlete completes several rotations

Question

The figures above show three stages of a dive performed by an athlete. During the dive, the athlete completes several rotations in midair while traveling from the platform to the surface of the water. Figure 1 shows the athlete just after jumping off the platform. Figure 2 shows the athlete rotating in midair. Figure 3 shows the athlete about to enter the water. 
(a) In a clear, coherent paragraph-length response that may also contain figures and/or equations, explain why the athlete's angular speed increases between Figure 1 and Figure 2 but decreases between Figure 2 and Figure 3. 
(b) is the rotational kinetic energy (K2, rotational) of the athlete in Figure 2 greater than, less than, or equal to the rotational kinetic energy (K1, rotational) of the athlete in Figure 1?

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