Develop an ER diagram data model,

The ER must cover the follwing concepts:

1- Specialization Hierarchy

2- Disjoint Constraints

3-Subtype Discriminator

4-Overlapping Constraints

5- Completeness Constraint

A- partial completeness

B- total completeness

After developing the ER diagram data model using the using the Crows Foot ERD. specifiy all the business rules, relationships degrees and cardinalties. Please do not use any examples form the textbook*.

*the answer should not mention on this book Database Systems: Design, Implementation, and Management, 11th Edition, Carlos Coronel and Steven Morris (2015),