All code please in C#$.$ Pictures please of your application window. You are a WebApp designer for the Online shopping application, the FargoOnline company.

Design and implement an online component to efficiently manage online customers.

STEPS:

Create a Content Design for your WebApp component. Use Lucidchart to Create Class diagrams for the $$Customer Component$.$

The design of content architecture focuses on the definition of the overall hypermedia structure of the WebApp.

Component Description:

$[10$ points$]$ Design a class named Person with properties for holding a person$$s first name, person$$s last name, email address, and telephone number. The class should include two constructors and the method ToString$().$

$[10$ points$]$ Design a class Customer that is derived from the Person class. The Customer class should have a property for a customer number and a Boolean property indicating whether the customer wishes to be on a mailing list. The class should include two constructors and the method ToString$().$

$[10$ points$]$ Design the PreferredCustomer class that is derived from the Customer class you previously created. The PreferredCustomer class should have properties for the amount of the customer$$s purchases and the customer$$s discount amount.

Preferred customer customers can earn discounts on all their purchases. The amount of a customer$$s discount is determined by the amount of the customer$$s cumulative purchases in the store as follows:

When a preferred customer spends $$500,$ they get a $5$ percent discount on all future purchases.

When a preferred customer spends $$1,000,$ they get a $6$ percent discount on all future purchases.

When a preferred customer spends $$1,500,$ they get a $7$ percent discount on all future purchases.

When a preferred customer spends $$2,000$ or more, they get a $10$ percent discount on all future purchases.

The class should include two constructors and the method ToString$().$

$[70$ points$]$ Implement$/$Develop your classes and test them with the Windows Forms Application.

Note:

The PurchaseAmount property should include get and the set methods.

The DiscountAmount property should include get and read$-$only set methods.

Use decimal data type for discount and amount values.

Add validations to your setters.