Add the following methods to the Fraction class to round out the arithmetic operations on fractions. Reduce the result within the method in each case: // Subtract argument from receiver –(Fraction *)...

Add the following methods to the Fraction class to round out the arithmetic operations on fractions. Reduce the result within the method in each case: // Subtract argument from receiver –(Fraction *) subtract: (Fraction *) f; // Multiply receiver by argument –(Fraction *) multiply: (Fraction *) f; // Divide receiver by argument –(Fraction *) divide: (Fraction *) f;