(a) In Missouri, lowa, and some other part of the states, there are a lot of turbines that are eventually used to generate electricity. One particular turbine blade of radius 32 m rotates with a constant angular speed of 3 revolutions per minute in a counter-clockwise direction. Due to a very strong storm, its angular acceleration reaches 40.0 rad/s in a counter-clockwise direction in 4 seconds. 

(i) What is its final angular acceleration? 

(ii) What is its angular displacement? Express your results in both radians and revolutions. (b) Computer CD of mass 5.8 gram is rotating about its center. What is its moment of inertia? Assume diameter of the disk is 60.0 cm