Exercise $2$: Inheritance and Polymorphism

Task: Create a base class Vehicle with a method start$()$ and two subclasses: Car and Bicycle.

Override the start $()$ method in both subclasses. Create instances of both subclasses, store them in an

array of Vehicle, and invoke the start$()$ method for each.

Instructions: After implementing the solution, draw a class diagram representing the classes Vehicle,

Car, and Bicycle. Include associations and any relevant attributes or methods.