Object-Oriented Programming In this separate files. ent, you'll need to build and run a small Zoo in Lennoxville. All classes must be created in Animal (5) First, start by building a class that describes an Animal at a Zoo. It should have one private instance variable for the name of the animal, and one for its hunger status (fed or hungry). Add methods for setting and getting the hunger satus variable, along with a getter for the name. Consider how these should be named for code clarity. For instance, using a method called hungry () to make the animal hungry could be used as a setter for the hunger field. The same logic could be applied to when it's being fed: public void feed () { this.fed = true; Furthermore, the getter for the fed variable could be named is Fed as it is more descriptive about what it answers when compared to get Fed. Keep this technique in mind for future class designs. Zoo (10) Now we have the animals designed and ready for building a little Zoo! Build a class called Zoo that contains an animal collection and a given address. Given that we'd like to increase the number of animals we have over time, we won't be able to use standard arrays. To have a dynamically-sized, resizable, or growable array, we will make use of the ArrayList class: https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/util/ArrayList.html To make a vector for the Animal collection, you can do the following: ArrayList animalCollection = new ArrayList(); animalCollection.add(new Animal ("Chloe the Bear")); Now let's get ready for some customers. Ensure that your Zoo can do the following: 1. Print opening hours for all Zoos (they all open and close at the same time 9AM-5PM). 2. Print the address of the Zoo. 3. Add an Animal to the Animal collection. 4. Feed, and set hunger for the Animals in the collection. 5. Print all Animals that are hungry in the Zoo. With all these methods implemented we are ready to open to the public! Pre-opening Day (5) You've realized that you should test your implementation before opening it the public! This means you will act as the first customer to the Zoos you are building, and perform at least the following in your main method: 1. Enter your Zoos (one is at "122 Queen St.", and the other at "248 College St."). 2. In the Zoo on Queen street, add these four Animals to the collection: a. Chloe the Bear b. Pete the Parrot 3. c. Sylvestre the Snake d. Manix the Monkey Leave the Zoo on College street empty. 4. Print the opening hours for the Zoos, and make sure they all match (i.e. not unique to instances). 5. Do the same for the addresses but this time they shouldn't match. 6. Feed "Chloe the Bear" at the Zoo on Queen St., and without it getting hungry again, try to feed it again. 7. Feed the same Animal at the Zoo on College St. 8. Print the Animals that are hungry at each Zoo. 9. Play with "Chloe the Bear" to make it hungry. 10. Re-print the Animals that are hungry. Competition (10) A competing zoo opened up next door on the same day as you. The Zoo has all the same features as yours currently has. Implement some feature(s) in your Zoo that will attract more people to yours! It should be created using 2 additional classes.

a. Write a FractionDemo program that instantiates several Fraction objects and demonstrates that their methods work correctly. Create a Fraction class with fields that hold a whole number, a numerator, and a denominator. In addition: Create properties for each field. The set access or for the denominator should not allow a 0 value; the value defaults to 1. Add three constructors. One takes three parameters for a whole number, numerator, and denominator. Another accepts two parameters for the numerator and denominator; when this constructor is used, the whole number value is 0. The last constructor is parameterless; it sets the whole number and numerator to 0 and the denominator to 1. (After construction, Fractions do not have to be reduced to proper form. For example, even though 3/9 could be reduced to 1/3, your constructors do not have to perform this task.) Add a Reduce() method that reduces a Fraction if it is in improper form. For example, 2/4 should be reduced to 1/2. Add an operator+() method that adds two Fractions. To add two fractions, first eliminate any whole number part of the value. For example, 2 1/4 becomes 9/4 and 1 3/5 becomes 8/5. Find a common denominator and convert the fractions to it. For example, when adding 9/4 and 8/5, you can convert them to 45/20 and 32/20. Then you can add the numerators, giving 77/20. Finally, call the Reduce() method to reduce the result, restoring any whole number value so the fractional part of the number is less than 1. For example, 77/20 becomes 3 17/20. Include a function that returns a string that contains a Fraction in the usual display format—the whole number, a space, the numerator, a slash (D, and a denominator. When the whole number is 0, just the Fraction part of the value should be displayed (for example, 1/2 instead of 0 1/2). If the numerator is 0, just the whole number should be displayed (for example, 2 instead of 2 0/3). b. Add an operator*() method to the Fraction class created in Exercise 11a so that it correctly multiplies two Fractions. The result should be in proper, reduced format. Demonstrate that the method works correctly in a program named FractionDemo2. c. Write a program named FractionDem03 that includes an array of four Fractions. Prompt the user for values for each. Display every possible combination of addition results and every possible combination of multiplication results for each Fraction pair (that is, each type will have 16 results).

Write a program named SalespersonDemo that instantiates objects using classes named Real EstateSalesperson and GirlScout. Demonstrate that each object can use a SalesSpeech() method appropriately. Also, use a MakeSale() method two or three times with each object, and display the final contents of each objects data fields. First, create an abstract class named Salesperson. Fields include first and last names; the Salesperson constructor requires both these values. Include properties for the fields. Include a method that returns a string that holds the Salespersons full name—the first and last names separated by a space. Then perform the following Create two child classes of Salesperson: Real EstateSalesperson and Girl Scout. The Real EstateSalesperson class contains fields for total value sold in dollars and total commission earned (both of which are initialized to 0), and a commission rate field required by the class constructor. The Girl Scout class includes a field to hold the number of boxes of cookies sold, which is initialized to 0. Include properties for every field. Create an interface named ISell able that contains two methods: SalesSpeech() and MakeSale(). In each Real EstateSalesperson and Girl Scout class, implement SalesSpeech() to display an appropriate one- or two-sentence sales speech that the objects of the class could use. In the Real Estatesalesperson class, implement the MakeSale() method to accept an integer dollar value for a house, add the value to the Real EstateSalespersons total value sold, and compute the total commission earned. In the Girl Scout class, implement the MakeSale() method to accept an integer representing the number of boxes of cookies sold and add it to the total field.

At most, a class can contain ____________ method(S). 0 1 2 any number of