Question: 23. Create a physical level 0 DFD for the following, and compare it to the logical model that you created in Chapter 6. A Real

23. Create a physical level 0 DFD for the following, and compare it to the logical model that you created in Chapter 6. A Real Estate Inc. (AREI) sells houses.

People who want to sell their houses sign a contract with AREI and provide information on their house.

This information is kept in a database by AREI, and a subset of this information is sent to the citywide multiple listing service used by all real estate agents.

AREI works with two types of potential buyers.

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