Create an activity diagram based on the following narrative, and display swim lanes: The purchasing department handles purchase requests from other departments in the company. People in the company who initiate the original purchase request are the "customers" of the purchasing department. A case worker within the purchasing department receives that request and monitors it until it is ordered and received. Case workers process the requests for purchasing products under $2,500, write a purchase order, and then send it to the vendor. Purchase requests over $2,500 must first receive approval from the customers department supervisor, if the customer is not the supervisor. If approval is granted, the case worker writes a purchase order and sends it to the vendor. If not, the customer is informed their purchase cannot be made.