A turbine fan in jet engine has a moment of inertia of 2.5 kg'm12 about its axis of rotation. As the turbine starts up, it angular velocity is given by w,2 = (40 rad/s 3)t*2. (a) Find the fan's angular momentum as a function of time, and find its value at t- 3.0s. (b) Find the net torque on the fan as a function of time, and find its value at t= 3.0s.