The main relation of a motor vehicle registration bureau's relational database includes the following attributes: VIN License Plate Owner Serial # Manufacturer Model Year Color
The Vehicle Identification Number is a unique number assigned to the car when it is manufactured. The License Plate Number is, in effect, a unique number assigned to the car by the government when it is registered. The Owner Serial Number is a unique identifier of each owner. Each owner can own more than one vehicle. The other attributes are not unique.
What is/are the candidate key(s) of this relation? If there is more than one candidate key, choose one as the primary key and indicate which is/are the alternate key(s).