Compu-Fix Computer Repairs Compu-Fix is a computer repair company operating out of a small workshop. The owner, Lee is the only person working in the company but he hopes to expand and employ more engineers in the near future. At present Lee holds much of the information about repair jobs in a filing cabinet but this is rather disorganised and he realises that a computer system would be a better method especially as any new members of staff would also need access to this information. When a customer brings in a faulty computer Lee logs the fault and the customer's details giving him/her an estimated date for the repair to be completed. Every day he checks the list of repairs and selects the jobs to be done that day. If he finds he doesn't have the required parts in stock for a repair he places a purchase order with his supplier and reschedules the job to a later date. When a repair is complete and the customer comes to collect the computer, Lee gives him/her an invoice and the customer pays immediately. Once a week Lee checks his stock of parts, and orders any that are getting low from his supplier.

(a) Draw a Context Diagram for Compu-Fix system. (b) Draw a Level 1 DFD for the above scenario.