Case Study: Inventory Management System $($OOP and Sets$)$

You are a software developer hired by a small store to create an Inventory Management System using Object$-$Oriented Programming $($OOP$)$ in Python. The system should allow the store to manage its inventory, including adding new items, updating the inventory, searching for items, and showing reports.

Requirements:

Create an item class with the following attributes:

$$ itemName

$$ price

$$ quantity $($integer$)$

Implement the following in the class:

$$ Create a constructor to initialize the values of an item.

$$Create an update method to modify the quantity of item in stock.

$$ Create a discount method to reduce the price of an item by a certain amount.

$$ Create a display method to display all the information of the item

$.$ Create a set of multiple items $($objects$)$