1 Assignment 2 Specification and Marking Criteria In this assignment, you are to implement a 3-tier enterprise application based on the following scenario. The application scenario A sell company needs to implement an e-business system. The system is a typical 3-tier enterprise application that integrates a presentation tier, a business tier, and a persistence tier. The executive of IT Department of the company has decided to use Java EE open source technology and related platforms and tools for the implementation of the system. As an officer of the IT Department of the company, you are designated as the developer for the system core. To accomplish this task, you will need to design, implement, test, and document the 3 tiers for the e-business system. The assignment specification 1. The persistence tier • The company sells similar products (e.g. books, CDs, …, or desktops, laptops, …). A major assumption is that these products share some common properties (product ID, product title, product description, … ). In order to minimise code redundancy, you should use inheritance mapping. In your design, the types of product are at least 2 and the Java classes should be at least 3 with 1 class as the super class to abstract the common properties and operations for at least 2 types of product defined by other 2 classes. • The product information must be persisted. You are required to use Java Persistence API (JPA 2.0) to persist the product information into a Derby database. You are required to use the Joined-Subclass Strategy (detailed on page 115 of the textbook) or Mapped Superclass Strategy (detailed on page 120 to 121 of the textbook) in your design of entities. • The company needs to store customers’ details and customers’ orders. You are required to use entities to persist customers’ details and customers’ orders. The relationship between a customer and his/her orders must be one-to-many unidirectional (detailed on page 100 to 103 of the textbook), i.e. a customer can…