Builde a Simple Program in C# and SQL SERVER (NO MYSQL) and Layers TODAY URGENT (UNIVERSITY PROJECT)

THIS IS NOT A REAL SYSTEM, IS ONLY FOR EDUCATION, VERY SIMPLE, ONLY TWO FORMS, CRUD FOR THE CLIENTS AND CARDS, AND THE ASSOCIATION.. AND THE TWO TABLES IN SQL SERVER. A promotions company made an offer to acquire a system that keeps track of all your cards and clients. The cards contain a number, expiration date, balance, discounts, status (Active, Low, without balance, expired), item (free, clothing, groceries), they can be National or international. In addition, the National card knows the province where it is going to be used, and the international one the country where it will be used. Customers are known Name, Surname, DNI, Date of Birth and the associated card., By regulation of the company to the customer can only associate one card. Customers can only be offered free cards, that is, they are not associated with any other customer, and the balance awarded depends on the customer's behavior. When the customer uses a card, a discount is made on the purchase made, if it is With a national card a discount of 25% is made and if it is an international one of 30%. In order to use the card, it must have a balance, and it must be active. The discounts are called "DiscountCalculated" since they return the Number and Type of the card and the discount granted. 1. Develop the class model that represents the problem. 3. Classes must be in separate projects (6 layers, 5 classes and 1 WindowsForm) 4. Deploy with SQL Server Database 5. Carry out the CRUD of Clients, and cards, the association of Cards, and the update of the card when making purchases. 6. The graphical interface must contain an MDI, and the corresponding CRUD forms, such as also datagridview and combos. 7. Inform: to. All clients and the card each one has b. All cards and with the balance and accumulated discounts. c. The card with the lowest amount d. The card with the greatest discounts 8. Catch all errors (also SQL ones) 9. Handle transactions 10. Inheritance and polymorphism 11. For the item and / or state they can do it with Enum