Create ERDS for the following cases. Identify entities, identifier and attributes for each entity, and relationships between the entities. Identifiers can be represented as either PK or underline. Define cardinalities of each relationship. In this assignment, you don't need to define an associative entity (optional). Let me clarify that while a many-to-many relationship should be converted to an associative entity for the next step (logical data modeling), this assignment for conceptual data modeling allows you to either leave it as many-to-many or use an associative entity for it. If needed, you can make some reasonable assumptions on attributes and cardinalities of relationship.