(iii) (4 pts) A non-rotating disk of moment of inertia l2 = 0.005 kg m2, is dropped onto a rotating disk of moment of inertia l, = 0.009 kg m2 and angular velocity w, =14 rad/s as shown. The two disks stick together and rotate with a common angular velocity W.- a) What is the magnitude of the common angular velocity we? ignore the mass of the shaft At rest b) What is the initial and final rotational kinetic energy of the system