IN JAVA.$$ Define a class called CSClass $($as in a computer science department class$)$ Define enough data and functionality to be meaningful. Use an array for student names and one for student numbers as a minimum of data.$$ Define some methods, making sure they do something useful $($like average grades, print out names$).$ You may define them as stubs for this part of the exercise. $$One method MUST be abstract$.$ Be sure to explain why you chose the one you did.