Draw a class diagram for each of the following situations.

  • A house may have many construction projects, but some houses never have such a project. A construction project can have a contractor, but this is not necessary. The construction project can have zero or many vendors.
  • Some people see a number of Broadway shows but some people never see a Broadway show. Each Broadway show sells many tickets to the show. The ticket includes the show, the theater, and the seat.
  • An airline provides many flights. Flights have a departure airport, an arrival airport, and may have several stopover airports. (At stopover airports, the flight lands and takes off again, and has the same flight number). Each airport is associated with a city. Each city can have zero or more airports, Each airport has many flights leaving and arriving each day.
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