A student sitting on a frictionless rotating stool has rotational inertia 0.90 kg*m^2 about a vertical axis through her center of mass when her arms are tight to her chest. The stool rotates at 6.80 rad/s and has negligible mass. The student extends her arms until her hand Part A Ignoring her arm mass, what's her new rotational velocity? Express your answer to two significant figures and include the appropriate units. s, each holding a 5.0 kg mass, are 0.79 m from the rotation axis. Part B Repeat if each arm is modeled as a 0.79 long uniform rod of mass of 4.8 and her total body mass is 60 . Express your answer to two significant figures and include the appropriate units.