Help in Database: (With Diagrams please.)

E2.3 Create requirements and the ER diagram for a scenario with two entities (both with several attributes) involved in a many-to-many relationship that has a relationship attribute.

E2.8 Create an example of an entity with a derived attribute.

E2.12 Create requirements and the ER diagram for the scenario with two entities (both with several attributes) involved in two separate relationships.

E2.13 Create requirements and the ER diagram for the scenario with two entities (both with several attributes), one of which is a weak entity and the other its owner entity, involved in an identifying relationship.