What is a data model? Discuss the main types of data models. $(2$ pts$)$

Briefly describe the six steps of database design? $(3$ pts$)$

Describe the key constraint and participation constraint. Draw an ERD that captures the information below.

A university database needs to store information about faculty members $($identified by faclD, with department and phone as attributes$),$ departments $($identified by dname, with facNum as an attribute$),$ and students of faculty $($with name and age as attributes$).$ Faculty work in departments; each department is managed by at most a department head $($who is a faculty$)$; a student must be identified uniquely by name when the advisor $($who is a faculty$)$ is known.

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