Draw a class diagram that reflect the following Java code segment as shown in Figure 4. public abstract class Vehicle { private int numberofWheels; public Vehicle () { this (0); } protected Vehicle (int w) { numberOfWheels = w; } public int getNumberOfWheels () { return numberOfWheels; } public abstract boolean hasEngine (); } public class Car extends Vehicle { } public class Bicycle extends Vehicle { } public class Motorcycle extends Bicycle { } Figure 4. A Sample Java Code