This is not the right solution! I am taling a model decision making course! We are talking about goal programming chapter! I need a constraints and deviations

In the waterfall model, the requirements must be completed before and design must be completed before

I have a HW that is asking me to draw on ERD diagram for a simple purchasing system that has order with order id, customer id, and date; order consists of one or more items; items consist of item id, description and price, and customers list customer id, name, and address. Can you help?

Computer Science a car showroom, a public library, a pharmacy, a clinic, a school(any of these plz) 2- Choose a suitable system scenario which has different interacting entities (at least 3 of them). Write a description of your system and describe each entity with its states and behaviors. Put this description as the introduction of your project report. 3- Using the Unified Modeling Language (UML), design a class diagram for each entity and add them to the project report. There must be at least 3 DIFFERENT CLASSES (The test class is not included). Your classes should demonstrate the following OOP concepts: a. Appropriate package and class declarations. b. Composition relationship. c. Inheritance relationship. d. Encapsulation (turn states and behaviors into attributes and methods). e. Correct access modifiers and data types. f. Constructors and copy constructors. g. Get and set methods (with using this keyword). h. toString() and equals() methods. 4- In the IDE, write a class…