$[10$ pts$]($Chapter $15$: Polymorphism$)$ You are running a pet clinic and need a program to

manage the pets. Create a base class Pet. We need to store the following information,

with the type in parenthesis, in the base class Pet: name $($string$),$ age $($int$),$ dates of visits

$($string pointer$).$ Since the dates of visits can grow, we need to use a string pointer to a

dyamic array of strings and each date is recorded in a string object in the following

format$$mm$/$dd$/$yyyy$.$ In addition, we need a class Dog that is a derived class of Pet.

The derived class Dog contains the following member variables: breed $($string$)$ and dates

of vaccination shots $($string pointer$).$ The type of dates of vaccination shots is the same

as dates of visits and we should use a string pointer to a dynamic array of strings. You

need to define the following member and friend functions for Pet:

$$ Constructor

$$ Virtual Destructor

$$ Accessors and mutators

$$ Virtual function print to print the name, age, and dates of visits

$$ Copy constructor

$$ Overloaded assignment operator $=$

Also define the following member functions for Dog:

$$ Constructor

$$ Virtual destructor

$$ Accessors and mutators

$$ Virtual function print to print name, age, dates of visits, breed, and dates of

shots

$$ Copy constructor

$$ Overloaded assignment operator $=$

Test your program. Write a function PrintBill that takes an argument of a reference to

Pet and print out the pet$$s information. Decalre a Dog object, fill in the necessary

information, and call PrintBill.