Figure 7.EX1 is a level 1 data flow diagram of data movement in a Niagara Falls tour age...

Figure 7.EX1 is a level 1 data flow diagram of data movement in a Niagara Falls tour agency called Marilyn’s Tours. Read it over, checking for any inaccuracies.

a. List and number the errors that you have found in the diagram.

b. Redraw and label the data flow diagram of Marilyn’s so that it is correct. Be sure that your new diagram employs symbols properly so as to cut down on repetitions and duplications where possible.