Count_classes(rosters, name): Description: Determine the number of classes that a person with the given name is enrolled in. Parameters: rosters, a dictionary of sets as described above. name, a string Return value: an integer, the number of times that name appears across all rosters Examples: refer to the last page.

10 kg of co2 is initially contained at 400 kpa and 300 k. the gas constant for carbon dioxide is 189 j/lkg k) and has a specific heat ratio, k, of 1.289. isentropic expansion then occurs until the pressure is 200 kpa. a) determine the initial volume of co2 in m. b) determine the final temperature in k. c) determine the work done by the system during the expansion kl.