Question #$1$ Modeling ER Diagram $(25$ points$)$:

Create an ER diagram based on the following requirements. Show entities, relationships, and

attributes.

Andy's Motors is a car dealership that keeps track of:

For each sales employee: salesename, startdate, number of years with dealership $($yearswith$),$ unique

salesessn, unique salesID.

For each service employee: serviceefname, unique serviceessn, unique serviceeID.

For each customer: cname $($composed of gname and clname$),$ phonenumber, unique cid.

For each vehicle: year, make, model, unique VIN

For each repair appointment: raptdate, unique raptID.

Additional requirements:

A sales employee must have at least one assigned customer but can have many assigned customers.

Each customer is assigned to one sales employee.

A vehicle is owned by exactly one customer.

Each customer owns at least one vehicle but may own many.

A vehicle may have many repair appointments but does not have to have any.

Each repair appointment is associated with one vehicle.

Each service employee participates in between zero and many repair appointments.

Each repair appointment has at least one service employee participating in it but can have up to

four service employees participating in it$.$

Each sales employee has exactly one service employee assigned as their tech expert.

A service employee can be assigned to up to three sales employees as a tech expert but does not

have to be assigned to any.