1. Construct a data dictionary and draw a hierarchy chart and flowchart or pseudocode for a program that merges three sales files (SALES1, SALES2, and SALES3).
Input: Input consists of the three files (SALES1, SALES2, and SALES3), each of which has the same format. Each record contains a salesperson number, date, and amount of sales.
**USE A FLOWCHART TO SHOW YOUR SOLUTION