In today's society, the answer is D.) Communism, socialism, and capitalism. Examples are Capitalism (United States), Communism (Russia), and Socialism (Cuba).
A seek tasks10+0.1xTms where T is the number of tracks of motion from one request to the next and 10.is a movement time constant.(b) one full rotation takes 7ms .(c) Transfer time is 1.2 Ms per sectors
