Develop a context diagram and level-0 diagram for the hospital pharmacy system described in the following narrative. If you find the narrative is incomplete, make up reasonable explanations to complete the story. Supply these extra explanations along with the diagrams.

The pharmacy at Mercy Hospital fills medical prescriptions for all hospital patients and distributes these medications to the nurse stations responsible for the patients care. Prescriptions are written by doctors and sent to the pharmacy. A pharmacy technician reviews each prescription and sends it to the appropriate pharmacy station. Prescriptions for drugs that must be formulated (made on site) are sent to the lab station, prescriptions for off the shelf drugs are sent to the shelving station, and prescriptions for narcotics are sent to the secure station. At each station, a pharmacist reviews the order, checks the patient file to determine the appropriateness of the prescription, and fills the order if it is at a safe level and it will not negatively interact with the other medications or allergies indicated in the patient file. If the pharmacist does not fill the order, the prescribing doctor is contacted to discuss the situation. In this case, the order may ultimately be filled, or the doctor may write another prescription depending on the outcome of the discussion. Once filled, a prescription label is generated listing the patients name, the drug type and dosage, an expiration date, and any special instructions. The label is place on the drug container, and the order is sent to the nursing station. The patients admission number, the drug type, and the amount dispensed, and the cost of the prescription are then sent to the billing department.