The Great E$-$books Store requires a software application to enhance the customer experience and streamine internal operations. The critical requirements for the software application are as toilows:

$1.$ E$-$book Management: The system should maintain a comprohensive catalog of the storefavailable e$-$books, Each e$-$book should have detalled information such as title, author, publication date, gente, and price.

$2$ customer Management: The system should facilitate customer infomation management, Iriching personal details like $($name and contact information$)$ customers can browse e$-$books online, creste an account, and purchase e$-$books, Upon purchase, they should receive an invoite with details of the order, e$-$book prices, and any applicable discounts or promotions,

$3.$ Shopping Cart and Orders: The system should allow customers to add e$-$books to their cart, remove items, or update quartities, Orders should rellect the riumber of e$-$books and orter date. Ebooks are delivered instantly upon purchase completion$-$

$4.$ Discounts and Prising: The system should support fiexible pricing and discount options. The e$-$book stores loyalty program members receive a $\backslash (10\backslash \%\backslash )$ discount on all purchases, and bulk purchases $(5$ or more e$-$boots in a single order$)$ receive a $\backslash (20\backslash \%\backslash )$ discount.

$5.$ Payment and invoicing: Each order should generate an invaice detalling the itemized price, applicable discounts, and the final total. Value$-$added Taxes $($Vat$)$ at a fixed rate of a$\backslash \%$ are applied to$.$ all purchases.

Requir andents:

$1.$ Design UML Class Diagram Design UML class diagram representing the concepts and relationshipsin the scenario. Ensure to use inheritance or association $($aggregation and composition$)$ relationshifs. You may make assumptions about attributes $($with proper access specified$)$ arid concepts not explicitly mentioned in the problem statement. A clear description of the lelationships, modularty, and assumptions must be included. All classes to meet the requirements must be idertified $($a minimum number of required classes is six f $6),$ and students are expected to demonstrate knowledge of different types of relationships:

$2.$ Write Python code to Implement Your UML Class Diagram Implement the Fython classes based on your UML diagram. Make sure to:

$1.$ Group the classes$/$into different files for good modularity

$3.$ Include comments and documentation to ensure good readability.

$4.$ The submitted code must be error$-$free and have well$-$formatted output, Each student's work will be unique in terms of the code and output.

$3.$ Define Test Cases Write test cases in a separate file to demontrate all the progran's features, Ensure to test all features. Some examples of test cases are $($riot limited to$)$:

$1.$ Add$/$Modify$/$Fiemove a new e$-$book to the e$-$bookstore's catalog.

$2.$ Add$/$Modify$/$Remove customer accolint.

$3.$ The addition of e$-$books to the shopping cart,

$4.$ Applying discounts for loyalty program members or bulk purchases:

$3.$ The generstion of an invoice showing relevant discounts and required payments,