CS 1713 Introduction to Computer Science Example Problem

Consider the Rectangle class that we developed in class.
It has a constructor with double parameters, the width and the length of the rectangle (in that order).
Suppose that the following program:

public class Rect2Test {

  public static Rectangle r1, r2, r3, r4, r5;

  public static void main(String[] args) {
    double x = 2;
    double y = 3;
    r1 = new Rectangle(x, y);
    r2 = new Rectangle(x, y);
    r3 = new Rectangle(x + 2, y + 3);
    r4 = r2;
    r5 = r3;
    showRectangleWidths();
    x = x + 1;
    r1.setWidth(25);
    showRectangleWidths();
    r2.setWidth(15);
    showRectangleWidths();
    r2 = new Rectangle(2 * x, 2 * y);
    showRectangleWidths();
    x = 30;
    r5.setWidth(x);
    showRectangleWidths();
  }

  private static void showRectangleWidths() {
    System.out.println(r1.getWidth() + " " + r2.getWidth() + " " +
                       r3.getWidth() + " " + r4.getWidth() + " " +
                       r5.getWidth());
  }
}

1. How many Rectangle variables are there?
2. How many Rectangle objects are there?
3. Draw an accurate schematic of the program variables after the code segment is executed.
4. What is the output generated?