A horizontal platform in the shape of a circular disk rotates one frictionless bearing about a vertical axle during the center of the disk. The platform has a radius of 4.34 m and a rotational inertia of 100 kg·m 2 about the axis of rotation. A 68.2 kg student walks slowly from the rim of the platform toward the center. If the angular speed of the system is 1.90 rad/s when the student starts at the rim, what is the angular speed when she is 0.940 m from the center?