O Design a Conceptual Schema using ER modeling concepts, including (Entities, Relationships, Attributes, Participation (Total or Partial), and Cardinality).

Entities:

Customer
Car
RentalLocation
RentalTransaction
Administrator
UserAuthentication
Relationships:

Rent
Manage
Authenticate
Attributes:

Customer:

CustomerID (Primary Key)
Full Name
Email
Phone Number
Date of Birth
Car:

CarID (Primary Key)
Manufacturer
Model
Manufacturing Year
License Plate
Daily Rental Rate
LocationID (Foreign Key)
RentalLocation:

LocationID (Primary Key)
Name
Street Address
City
State
Postal Code
RentalTransaction:

TransactionID (Primary Key)
CustomerID (Foreign Key)
CarID (Foreign Key)
RentalLocationID (Foreign Key)
Start Date
End Date
Administrator:

AdminID (Primary Key)
Username
Password
UserAuthentication:

UserID (Primary Key)
Username
Password
Role
Participation (Total or Partial):

Total participation:
Each RentalTransaction must be associated with a Customer, a Car, and a RentalLocation.
Each Car must be associated with a RentalLocation.
Partial participation:
Not every Customer must have a RentalTransaction.
Not every Car must have a RentalTransaction.
Cardinality:

Rent:

Each Customer can rent multiple Cars.
Each Car can be rented by multiple Customers.
Each RentalTransaction involves one Customer and one Car.
Each RentalTransaction is associated with one RentalLocation.
Manage:

Each Administrator manages multiple aspects of the system, including Car inventory, RentalLocations, and Customer accounts.
Authenticate:

Each UserAuthentication record is associated with one Administrator or Customer.
This conceptual schema captures the entities, relationships, attributes, participation, and cardinality required for the car rental company's database system. It ensures data integrity, supports the necessary functionalities, and lays the groundwork for further database design and implementation.