Qn $2$: Identify the business rules represented in the following ERD.

a$)$

b$)$

c$)$

Qn $3.$ Write the database table design to represent each data model below, including tables, and the proper placement of the primary and foreign keys.

a$.$

b$.$

c$.$

d$.$

e$.$

Qn $4.$

Consider the ERD shown in the following figure and convert it into a relational data structure using the conversion rules covered in this week$$s lecture.