design a banking system use java

• you must have at least one parent class and at least three child/grandchild classes (15 points)
  • each class must contain (either directly OR inherited from a parent):
    • instance data variables (10 points)
    • constructor(s) (15 points)
    • getters and setters (10 points)
    • overridden toString method (10 points)
    • overridden equals method (15 points)
• your classes must have a total of at least three class-specific methods (you can have just simple printlns as the method implementation for now) (10 points)
  • these methods must represent functionality of objects- some action or behavior that the object takes or that is taken on the object
  • the getters/setters do not count!
  • these methods must be instance methods- this means they cannot be static
• write a driver program to demonstrate your classes (15 points)
  • create an array or ArrayList using the parent class as the declared type
  • fill with several different child objects
  • invoke at least two methods on the objects (if the method exists only in the child class, use instanceof and a downcast)