3. Explain both overloading and overriding, and provide an example for each.

a. Declare a class called employee having employee_id and employee_name as members. b. Extend class employee to have a subclass called salary having designation and monthly) salary as members. c. Define the following: i. Required constructor. ii. A method to find and display all details of employees drawing a salary more than 20,000/-. iii. Method main for creating an array for storing these details given as command line arguments and showing usage methods.