Your preliminary investigation and fact-finding tasks are complete. The next step is to develop a logical model of the proposed billing system. Prepare a report that addresses the following:

(1) Prepare a context diagram and diagram 0 DFD for the new system. Make sure you use the correct combination of Gane and Sarson symbol notation for external entities, process(es), data storage, and data flow lines.

(2) Prepare a list of data stores and data flows needed for the system. Many of these will follow the identification and labeling that you used in the Diagram 0 DFD in #1. Under each data store, list the data elements you would include in the data stores, based on previous fact-finding information.

(3) Create a decision table that describes how the Willowbrook School determines which discounts, if any, are to be applied to the fixed fees for a child. Make sure that you follow all of the steps and guidelines as listed in your book.