This assignment concerns a liquor shop chain in Sydney, called the A-one liquor (AL). The objective of this assignment is to develop a database system that will be used to centrally store and manage all relevant information for the branches of AL. The information to be stored include information on different branches of AL (e.g., Bankstown, Hornsby, etc.), types of drinks they sell (beers, wines, cedars, etc.), staff they employ (Retail Assistants, Shelving Assistants, etc.), AL Members (AL Loyalty Card holders). The basic requirements gathered from the stake holders is presented in the following four points. As typically the case, these requirements are often underspecified. Use your judgment in interpreting them when required and keep a note of the assumptions you made. 1. Branch Information: The AL System shall keep information on each branch including its name and address, and the number of employees who work there. The system shall also contain information on which days (Mon-Sun) the branch is open, and opening hours. It will also keep information on opening hours (e.g., Mon-Fri 10:00AM-5:30PM; Sat 9:00AM-9:00PM; Sun Closed).Product Information: The system shall contain relevant information on products of different types at the “item level”, such as: (wine/beer/spirit/…), packaging info (can/bottle/…), volume (e.g., 375ml X 6 pack), price, and brand (e.g., Tooheys Old Dark Ale), as well as current stock level. 3. Staff Information: The system shall record information on staff members who work at different branches of AL. This will include their roles, type of employment (e.g., permanent, casual), salary (annual or hourly depending on permanent or casual), as well as who they report to (i.e., supervisors). 4. Membership Information: The system shall record information on AL members, including type of membership (Platinum/Gold/Silver), and when the membership will expire. Develop an Entity-Relationships Diagram for the given scenario (It must contain entities and unique identifiers in terms of keys, relationships between the entities including relationships constraints, and the attributes). Provide the ER diagram with relationships between entities in detail with full explanation ? Also provide the physical information and diagram ?