Given the following narrative, develop either an activity diagram or a fully developed description for a use case of Add a new vehicle to an existing policy in a car insurance system.
A customer calls a clerk at the insurance company and gives his policy number. The clerk enters this information, and the system displays the basic insurance policy. The clerk then checks the information to make sure the premiums are current and the policy is in force.
The customer gives the make, model, year, and vehicle identification number (VIN) of the car to be added. The clerk enters this information, and the system ensures that the given data is valid. Next, the customer selects the types of coverage desired and the amount of each. The clerk enters the information, and the system records it and validates the requested amount against the policy limits. After all of the coverages have been entered, the system ensures the total coverage against all other ranges, including other cars on the policy.
Finally, the customer must identify all drivers and the percentage of time they drive the car. If a new driver is to be added, then another use case, Add new driver, is invoked.
At the end of the process, the system updates the policy, calculates a new premium amount, and prints the updated policy statement to be mailed to the policy owner.