SYSTEMS ANALYSIS AND DESIGN

Consider the following operation specification, regarding the return of a car (by car we intend an individual car, not a car make/model; there can be more than one car of the same make/model) to a car rental agency by a customer.

Upon receiving the car ID, the operation needs to do the following.

1. Change the status of the car from with_customer to available.
2. If the current date is later than the return date (set at the time of the booking), apply a penalty of 50 per each extra day.
3. If the tank is not full, apply a penalty of 10 for each 10% missing (assume the fuel indicator has 11 notches, from 0% to 100%).
4. If no penalty is applied, issue a 10% discount voucher to the customer.

Give this specification with an activity diagram or in controlled English / pseudo-code.