A student sitting on a frictionless rotating stool has rotational inertia 0.95 about a vertical axis through her center of mass when her arms are tight to her chest. The stool rotates at 6.85 and has negligible mass. The student extends her arms until her hands, each holding a 4.2 mass, are 0.77 from the rotation axis. Ignoring her arm mass, what's her new rotational velocity?