An organization has been entrusted with developing a registration and title system that maintains information about all vehicles registered in a particular state. For each vehicle that is registered with the office, the system has to store the name, address, and telephone number of the owner, the start date and end date of the registration, plate information

(issuer, year, type, and number), sticker (year, type, and number), and registration fee. In addition, the following information is maintained about the vehicles themselves:

the number, year, make, model, body style, gross weight, number of passengers, diesel-powered (yes/no), color, cost, and mileage. If the vehicle is a trailer, the parameters dieselpowered and number of passengers are not relevant. For travel trailers, the body number and length must be known.

The system needs to maintain information on the luggage capacity for a car, maximum cargo capacity and maximum towing capacity for a truck, and horsepower for a motorcycle. The system issues registration notices to owners of vehicles whose registrations are due to expire after two months.

When the owner renews the registration, the system updates the registration information on the vehicle.

a. Develop an object-oriented model by drawing a class diagram that shows all the object classes, attributes, operations, relationships, and multiplicities. For each operation, show its argument list.

b. Each vehicle consists of a drive train, which, in turn, consists of an engine and a transmission. (Ignore the fact that a trailer doesn’t have an engine and a transmission.)
Suppose that, for each vehicle, the system has to maintain the following information: the size and number of cylinders of its engine and the type and weight of its transmission. Add classes, attributes, and relationships to the class diagram to capture this new information.

c. Give a realistic example (you may create one) of an operation that you override in a subclass or subclasses.
Add the operation at appropriate places in the class diagram and discuss the reasons for overriding.