CEN5087 - Software and Data Modeling, Spring 2021 Homework #2 (8 points), Due Feb. 11 (Thursday) Objectives: This assignment enables students to learn the following modeling activities and techniques through a simplified real-world application: (1) Domain Analysis, (2) Structural model development, and (3) UML notation - Class Diagrams. An E-Commerce System An e-commerce system such as Amazon or E-Bay enables vendors to list items and customers to purchase items. The payment of the items is through a third party such as PayPal or a credit card company. The purchased items are shipped through a third party company such as Amazon or UPS, which can be tracked. Customers can also return the items within a specified time frame to get refund. Please investigate this type of systems using your own experience and online resources. Solution Requirements: Based on your answers (and the corrections) of Homework 1, complete the following: (1) (7 points) Identify all important classes and their relationships, and draw a class diagram for the whole system; (2) (1 points) Identify and list a few key attributes and operations for two important classes