Draw a level 0 DFD for the real estate system in Exercise E, Chapter 4 and export it to PDF.

E. Examine the data models that you created for Exercise 25 How would the respective models change (if at all) on the basis of these corresponding new assumptions? Two patients have the same first and last names. Researchers can be associated with more than one institution. The store would like to keep track of purchased items. Many buyers have purchased multiple cars from Jim over time because he is such a good dealer