Write an abstract superclass encapsulating a vehicle: A vehicle has two attributes: its owner's name and its number of wheels. This class has two non-abstract subclasses: one encapsulating a bicycle, and the other encapsulating a motorized vehicle. A motorized vehicle has the following additional attributes: its engine volume displacement, in liters; and a method computing and returning a measure of horsepower which is the number of liters times the number of wheels. Write an application class utilizing these two classes.

Also, can someone explain how many classes I need and where/how I located them. Do I simply create a Java class for each one needed? Thank you in advance.