MIS 330 Real Estate Multiple Listing Service Assignment Event Table, Context Diagram and Level 0 DFD Exercise The REAL ESTATE MULTIPLE LISTING SERVICE SYSTEM supplies information that local real estate agents use to help them sell houses to their customers. During the month. agents list houses for sale (listings) by contracting with homeowners. The agent works for a real estate office. which sends information on the listing to the multiple listing services. Therefore. any agent in the community can get information on the listing. Information on a listing includes the address. year built. square feet. number of bedrooms. number of bathrooms. owner name. owner phone number. asking price. and status code. At any time during the month. an agent might directly request information on the listings that match customer requirements. so the agent contacts the multiple listing senice system with the request. Information on the house. on the agent who listed the house. and on the real estate oice the agent works for is provided. For example. an agent might want to call the listing agent to ask additional questions or call the homeowners directly to make an appointment to show the house. Tuice each month (on the 15th and 30th). the multiple listing service produces a listing book that contains information on all listings. These books are sent to all of the real estate agents. Many real estate agents want the books (which are easier to ip through). so they are provided even though the information is often out of date. Sometimes agents and owners decide to change information about a listing. such as reducing the price. correcting previous information on the house. or indicating that the house is sold. The real estate office sends in these change requests to the multiple listing senice when the agent asks the ofce to do so. Given the narrative description above. compile an event table and draw a context diagram and a level 0 DFD. State any assumptions if the description is unclear