Write a program that prompts the user for two numbers, then prints

To do so, implement a class

public class Pair

   Constructs a pair.
      \@param aFirst
the first value of the pair
      \@param aSecond
the second value of the pair
   public Pair(double aFirst, double aSecond) { . . . }


   Computes the sum of the values of this pair.
the sum of the first and second values
   public double getSum() { . . . }
   . . .

Then implement a class PairTester that constructs a Pair object, invokes its methods, and prints the results.

Complete the following files: