The Domain we chose:

$**$Airline tickets reservation management system.$**$

$.$

Part $1$:

A$.$Description of the mini$-$world $($write$-$up$).$

B$.$Enhanced entity$-$relationship $($EER$)$diagram with specified cardinality ratio and participation constraints.

$$Minimum of five $(5)$strong entities.

o At least one $(1)$multivalued attribute.

o At least one $(1)$composite attribute.

$$Minimum of one $(1)$weak entity.

$$Minimum of three $(3)$relationships$.$

o At least one $(1)$ternary relationship.

$$Minimum of one $(1)$specialization$.$

Complete part a and b

Draw out part b