SUBJECT IS Management information systems.

Create requirements and the ER diagram for a scenario with two entities (both with several attributes) involved in the following relationships:

1. 1:M relationship, where participation on the 1 side is mandatory and participation on the M side is optional.

2. 1:M relationship, where participation on the 1 side is optional and participation on the M side is mandatory.

3. 1:M relationship, where particpation on both sides is mandatory.

4. 1:M relationship, where particpation on both sides is optional.

5. M:N relationship, where particpation on one side is mandatory and participation on the other side is optional.

6. M:N relationship, where participation on both sides is mandatory.

7. M:N relationship, where participation on both sides is optional.

Please explain steps and rules used having a tough time with this stuff.