A new Java project InheritanceDemo, and two additional classes: Box.java and KleenexBox.java.   InheritanceDemo.java: // StudentName Today's Date public class InheritanceDemo { public static void main(String[] args) { KleenexBox kb1 = new KleenexBox(); KleenexBox kb2 = new KleenexBox(100);   System.out.println("kb1 has " + kb1.numTissues + " tissues and is " + kb1.length + " by " + kb1.width); System.out.println("kb2:" + kb2); } }   Box.java: // Student Name Today's Date   public class Box { public double width; public double length; public String label; } KleenexBox.java: // Student's Name Today's Date public class KleenexBox extends Box { public int numTissues;   //A new Kleenex box public KleenexBox() { numTissues = 50; length = 8.0; width = 5.0; }   //A new Kleenex box with a specific number of tissues public KleenexBox(int numberOfTissues) { numTissues = numberOfTissues; length = 8.0; width = 5.0; }   public String toString() { return ("This box is " + length + " by " + width + " and has " + numTissues + " tissues."); } }   Questions: 4.1. What type of variables are kb1 and kb2: Box or KleenexBox?   4.2. How does the programmer specify that KleenexBox is a type of Box?   4.3. Notice how KleenexBox objects have a length and a width, but those fields are not declared in the KleenexBox class. Where do the length and width fields come from?   4.4. What additional fields and/or methods does a KleenexBox have that a Box does not?   4.5. Suppose you wanted a new type of box called ShippingBox. Which of the following would you use to declare that class? (Choose one.) 4.5.a. public class ShippingBox extends Box {} 4.5.b public class Box extends ShippingBox {} 4.5.c. public class ShippingBox IS_A Box {} 4.5.d. public class ShippingBox { box A; }

A new Java project InheritanceDemo, and two additional classes: Box.java and KleenexBox.java.

InheritanceDemo.java:

// StudentName Today's Date

public class InheritanceDemo {

public static void main(String[] args) {

KleenexBox kb1 = new KleenexBox();

KleenexBox kb2 = new KleenexBox(100);

System.out.println("kb1 has " + kb1.numTissues + " tissues and is " + kb1.length + " by " + kb1.width);

System.out.println("kb2:" + kb2);

}

}

Box.java:

// Student Name Today's Date

public class Box {

public double width;

public double length;

public String label;

}

KleenexBox.java:

// Student's Name Today's Date

public class KleenexBox extends Box {

public int numTissues;

//A new Kleenex box

public KleenexBox() {

numTissues = 50;

length = 8.0;

width = 5.0;

}

//A new Kleenex box with a specific number of tissues

public KleenexBox(int numberOfTissues) {

numTissues = numberOfTissues;

length = 8.0;

width = 5.0;

}

public String toString() {

return ("This box is " + length + " by " + width + " and has " + numTissues + " tissues.");

}

}

Questions:

4.1. What type of variables are kb1 and kb2: Box or KleenexBox?

4.2. How does the programmer specify that KleenexBox is a type of Box?

4.3. Notice how KleenexBox objects have a length and a width, but those fields are not declared in the KleenexBox class. Where do the length and width fields come from?

4.4. What additional fields and/or methods does a KleenexBox have that a Box does not?

4.5. Suppose you wanted a new type of box called ShippingBox. Which of the following would you use to declare that class? (Choose one.)

4.5.a. public class ShippingBox extends Box {}

4.5.b public class Box extends ShippingBox {}

4.5.c. public class ShippingBox IS_A Box {}

4.5.d. public class ShippingBox { box A; }

Rubric:

Student name is a comment on the first line of each .class file: -5 points if failed

Questions: 5 points, 1 point per question

Screenshot and source code: 5 points

Please paste a screenshot of a successful program run, and copy-and-paste the source code from your .java files, here: