This assessment item is to develop a conceptual data model based on the following case study. It relates to the unit learning outcome numbers 1 and 3 in the unit profile. Assessment task In this...

This assessment item is to develop a conceptual data model based on the following case study. It relates to the unit learning outcome numbers 1 and 3 in the unit profile.
Assessment task
In this assignment, you are going to perform the entity-relationship data modelling based on the following application scenario.
The application scenario: Australasia Auto Services
Australasia Auto Services (AAS) is a prestigious dealer of cars based in Rockhampton, Queensland. Their main business is to provide professional maintenance services for various cars and also sells a wide range of new vehicles. With the boom of its business in recent years, AAS needs a relational database system to store information related to its business. In this assignment, your task is to design an entity relationship (E-R) data model for a database to be used by AAS in order to manage various information related to their business activities efficiently. You should read the case study carefully, making a note of all the entities you think are involved, and of their attributes. Consider the relationships between the entities as you do this. Although AAS hires many staff, each employee can be categorised one of three types: mechanic, salesperson, and administration staff. The duty of mechanic is to perform car maintenance service, while the salespersons are responsible for sales and the administration staff deal with a wide range of administrative jobs or miscellaneous tasks.  Each employee at AAS has a unique employee number, and AAS maintains normal contact information about each employee. In addition, the technical trade level and expertise of mechanics, the number of year in sales experience for a salesperson, and the qualification of admin staff are to be recorded in the system. After a phone booking, a client will bring a car in for service on a specified date and the admin staff will record the car details that include the registration number, manufacturer, make, model, produced year and colour. The admin staff will also record a description of service requirement. Then the system will assign a unique identifier number for this service job. It is necessary to point out that the client’s car could be a car purchased from AAS, or it may be bought from somewhere else. For the former case, some relevant details such as the salesperson name, price, and warranty due date are required to keep in track