using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace InheritanceActivity

$\{$

public class Animal

$\{$

public string Name $\{$ get; set; $\}$

public int Legs $\{$ get; set; $\}$

public Animal$()$

$\{$

Name $=$ "Animal";

Legs $=0$;

$\}$

public virtual string GetName$()$

$\{$

return Name;

$\}$

public virtual string GetLegs$()$

$\{$

return Legs.ToString$()$;

$\}$

public virtual string GetSpecialAbility$()$

$\{$

return $"$

Eating...";

$\}$

public string Display$()$

$\{$

return GetName$()+""+$GetLegs$()+$GetSpecialAbility$()$;

$\}$

public override string ToString$()$

$\{$

return Display$()+"$

$"$;

$\}$

$\}$

public class Dog : Animal

$\{$

$//$Complete the constructor for Dog and GetSpecialAbility$()$ function

public Dog$()$

$\{$

$//$ToDo

$//$Set the dog name "Dog" and Legs to be $4$

$\}$

public override string GetSpecialAbility$()$

$\{$

$//$ToDo

$//$replace return null and return dogs special ability "Woof";

return null;

$\}$

$\}$

public class Fish : Animal

$\{$

$//$TODO

$//$Complete the constructor for Fish and GetSpecialAbility$()$ function

$\}$

public class Shark : Fish

$\{$

$//$TODO

$//$Complete the constructor for Shark and GetSpecialAbility$()$ function

$//$Shark Takes the last animal as parameter to the constructor method.

$//$Shark ate the last animal as the SpecialAbility.

public Shark$($Animal animal$)$

$\{$

$\}$

$\}$

class Program

$\{$

static void Main$($string$[]$ args$)$

$\{$

$/*$ The main method is complete.

$*$ You do not need to modify the main method code.

$*/$

Animal lastAnimal $=$ null;

Animal animal $=$ null;

string input;

while $(($input $=$ Console.ReadLine$())!=$ "exit"$)$

$\{$

if $($input $==$ "animal"$)$

$\{$

animal $=$ new Animal$()$;

lastAnimal $=$ animal;

$\}$

else if $($input $==$ "dog"$)$

$\{$

animal $=$ new Dog$()$;

lastAnimal $=$ animal;

$\}$

else if $($input $==$ "fish"$)$

$\{$

animal $=$ new Fish$()$;

lastAnimal $=$ animal;

$\}$

else if $($input $==$ "shark"$)$

$\{$

animal $=$ new Shark$($lastAnimal$)$;

lastAnimal $=$ animal;

$\}$

else if$($input $==$ "exit"$)$

$\{$

return;

$\}$

Console.WriteLine$($animal$)$;

$\}$

$\}$

$\}$

$\}$

$//$ Sample Outputs

$/*$Command Words

animal

dog

fish

shark

exit

Sample Input$/$Output $1$:

animal

Animal $0$

Eating...

dog

Dog $4$

Woof

fish

Fish $0$

Just keep swimming

shark

Shark $0$

Shark ate Fish

exit

$---------------------------$

$*/$

$/*$Command words

animal

shark

fish

shark

dog

shark

shark

exit

Sample Input$/$Output $2$:

animal

Animal $0$

Eating...

shark

Shark $0$

Shark ate Animal

fish

Fish $0$

Just keep swimming

shark

Shark $0$

Shark ate Fish

dog

Dog $4$

Woof

shark

Shark $0$

Shark ate Dog

shark

Shark $0$

Shark ate Shark

exit

$*/$ Create a simple set of classes representing types of animals.

$1.$ Create a base class representing all animals. The base class should contain a field for the animal$$s name. The name should be set to $$Animal$$ by default but should also be set to a more specific value by any derived classes. The base class should also have a field for storing the number of legs the animal has. By default, in the Animal class, legs are set to $0.$ The animal class should have three virtual functions namely $$GetName$(),$ GetLegs$(),$ and GetSpecialAbility$(),$ that return the Animal$$s Name, the total number of legs, and the special ability of the Animal. Moreover, this base class contains an overridden ToString$()$ method, to return all of its state variables in a given format. $[$Please investigate the starter code, or the provided input$/$ output to understand the format.$]$

$2.$ Create a Dog class that is a type of Animal, and the class also contains a method called GetSpecialAbility$()$ that returns $$Woof$.$

$3.$ Create a Fish class that is a type of Animal, and the class also contains a method called GetSpecialAbility$()$ that returns $$Just keep swimming$.$

$4.$ Create a Shark class that is a type of Fish, and also contains a method called GetSpecialAbility$()$ that uses a reference animal object that was initially passed as a parameter to a constructor method and returns $$Shark ate