Draw a State Diagram for the states that a cell phone status can be in, using the description provided below.

A customer goes to a cell phone store to purchase a cell phone. The salesman creates a cell phone application for the customer, including the cell phone identifier and customer application information. The cell phone status is set to pending credit check and the phone remains inactive until the salesman has established the credit rating of the potential customer. If their credit rating is satisfactory, the salesman submits an activation request to the switching department, and the status of the cell phone is set to pending activation. If the credit rating is unsatisfactory, the cell phone purchase is cancelled, and the status is adjusted accordingly. The switching department then activates the cell phone that is pending an activation by adding it to the list of valid cell phones on the cell phone system, assigning it a status of active. Now, the cell phone is active. When the customer makes their first phone call following activation, the cell phone status is set to in service and the start date of service is established. If the customer tries to use the cell phone, and the cell phone is not active or in service, the call is refused. The customer can cancel their cell phone account at any time and the cell phone status is set to cancel.