3. Develop a context diagram and level-0 diagram for the SAH hospital pharmacy system described in the following description. Make any needed assumptions that may not be clear in the text and explain as needed.

The pharmacy at SAH fills medical prescriptions for all hospital patients and distributes those medications to the nursing 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 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, reviews the patients file to determine the appropriateness of the prescription and fills the order if the dosage is at a safe level and that it will not negatively impact the patient as indicated in the file. If the pharmacist does not fill the order, the presiding doctor is contacted to discuss the order. In this case, the order may be filled or a new prescription is ordered and original order is cancelled. Once filled, a prescription label 3 is generated listing the patients name, the drug type and dosage, an expiration date and any special instructions. Th e label is placed on the drug container and the order is sent to the appropriate nurse station. The patients admission number, the drug type and amount dispersed and the cost is sent to the billing department.