Astudent on a piano stool rotates freely with an angular speed of 2.95 rev/s. the student holds a 1.25kg mass in each outstretched arm 0.759m from the axis of rotation. the combined momment of inertia of the student and the stool, ignoring the two masses, is 5.43kg*m^2, a value that remains constant. as the student pulls his arms inward, his angular speed increases to 3.54 rev/s.
a) how far are the masses from the axis of rotation at this time considering the masses to be points
b) calculate the initial and final kinetic energies of the system.