22 Class Rational Q2.1 Data . A rational number is one which can be expressed as a ratio of two integers, a numerator and a denominator. . Declare a class Rational with two private data members n and d of type int. . Obviously, n is the numerator and d is the denominator. e Mathematically, there is a problem if the denominator equals zero, but we shall not worry about that here. class Rational f public: // etc private: int n, d; J; . We shall add some public and private methods to the class Rational