Prior to beginning this discussion, read Chapter $3$: The Relational Database Model and Chapter $4$: Entity Relationship $($ER$)$ Modeling from the course text. In addition, you may also want to complete problems $24,25,26,27,28$ in Chapter $3.$ These problems will teach you how to use the entity relationship diagram to graphically create a logical view of the database, and it will assist you in completing this discussion.

Entity relationship models are limited in what they can express. It helps to be aware of the limitations up front, since they can affect the choices you make as to how you represent the enterprise you are modeling. Describe some of the ER design limitations$,$ and discuss how understanding these limitations will influence how you choose to model a particular situation, so that you are able to represent the things that are most important.