JAVA

Using the static keyword, define an abstract class called Calculator that has four methods; add, subtract, divide and multiply. Each method should be defined to take two numbers as arguments, perform a calculation on the numbers, and return a result.

Using the if-then- else statement, write a program that accepts user inputs. The program should ask a user to type two numbers and choose an option to add, subtract, divide or multiply the numbers. Whenever the user chooses the correct option, the program should invoke an appropriate method of the Calculator class and display its result.