(9) [6 points] Consider the energy storage flywheel from last week's homework. You determine that if you let the flywheel spin freely from its initial lower angular velocity, it comes to a stop in 120 seconds. This is due to the frictional torque acting on the axis of the flywheel. (a) Find the numerical value of that torque. Presumably, that torque is present when the flywheel is spinning at constant angular velocity. (b) Find the power needed to maintain the lower angular velocity against the torque of friction. (c) Calculate the power needed to spin up the flywheel in 6 seconds