Some large cities (e. g., Cologne, Germany) have started a project called car-sharing to reduce the number of cars in the city and also to reduce the cost of having a car available when needed by a person. One car is partially owned by several people. The number of owners per car may vary. Typically, not more than four people own one particular car. Also, each person can own a different percentage of the car, depending on how often she uses the car. Each person might own a share of more than one car. Obviously, only one person can use the car at any particular time. Thus, a database is needed to keep track of reservations made for the car. Required:
Show the data model for the above problem including the attributes. Provide the metadata for the entities.