Exercise 1 (5 points) A pair of integers is one formed by two integers. Example: (1, 2) is a pair of integers. a) Define a class named Couple (class) with two private attributes p and q of type int (elements of a couple). The Couple class must be composed: - from three manufacturers:  a constructor to initialize the private attributes of the couple.  a second constructor which will initialize the elements of the couple to 0.  a third constructor, which will initialize a couple using another couple. - getP and getQ methods allowing to access each element of the couple. - setP and setQ methods allowing to modify each element of the couple. - a display method which will display the instance variables. - a compare method, public boolean compare (Couple); which compares two couples according to the following lexicographic rule: (p1, q1) <(p2, q2) if and only if (p1