A person is riding a bicycle, and its wheels have an angularvelocity of 11.0 rad/s. Then, the brakes are applied and the bikeis brought to a uniform stop. During braking, the angular displacement of each wheel is 19.6 revolutions. (a) How much time does it take for the bike tocome to rest? (b) What is the anguar acceleration(in rad/s2) of each wheel?