Q$1.$ Write a Java program to create a class named Exam with the following:

a$)$ Declare the Fields: Code, CName, Level, Mark $($ data types int and

$5$ marks

String $)$

b$)$ Declare the following:

Override constructors.

Function name : Show$()-$ to display the Exam details.

Declare a mutator method UpdateMark$()$ to increase the mark of a student by $2$ mark and print the updated Age.