A hospital wants to create a database regarding its indoor patients. The information to store

includes:

$-$ Name of the patient

$-$ Age of the patient

$-$ Disease

$-$ Date of admission

$-$ Date of discharge

A$.$ Create a class called Patient to store the above information.

$-$ The member methods should include entering information and displaying the patient's information $($getters and setters$).$

B$.$ Create a class Date to have the date $($year$,$ month, and day as its fields$)$ and a method to display the date.

C$.$ Create a class Hospital to have a list to store all patients:

$-$ It has methods to add a patient to the list and delete a patient from it$.$

$-$ It also has a method to display a list of all the patients in the hospital.

$-$ It also has a method to display only the patients whose age is less than $12.$