An ice skater is spinning at 0.70 rev/s with her arms extended. She has a moment of inertia of 2.50 kg·m2 with her arms extended and of 0.60 kg·m2 with her arms close to her body. (a) What is her angular velocity in revolutions per second after she pulls in her arms? (b) What is her rotational kinetic energy before and after she does this