A parking station in Binghamton serves customers paying fixed monthly fees. Each
customer has attributes, customer ID (identifier) assigned by the parking station,
customer name, customer address, and customer phone. The monthly fee changes
periodically and is negotiated separately for each customer. The parking station wishes to
maintain a history of the fee details for each customer. The attributes of fee details
include fee ID (identifier), amount, time period, start date, and end date. The parking
station has more than 1000 parking spots with sensors that detect whether there is a car
parked in that spot. Each parking spot has attributes, parking spot ID (identifier), parking
spot floor, and parking spot number. The sensor can also detect which customer has
parked at that spot and when. The parking station wants to keep track of each time a
customer uses a parking spot, including the number of the license plate, start and end
parking times. Draw a project-level ER diagram for this situation.
