A government wishes to create a database to hold information about the films made and actors used by its film companies. Each film company makes a number of films, with a film being made by only one film company. Some films are independently made and therefore not made by a film company. Each director may direct many films with a film being directed by only one director. A film is always acted in by many actors with each actor acting in a number of films. Actors are represented by, at most, one agent. Some actors represent themselves and some agents represent several actors. (a) Identify and justify appropriate entity types. (b) Identify the attributes and associate them with entity or relationship types. (c) Identify appropriate relationships between these entities and name them. (d) Produce an ER diagram