Suppose you are designing a database for an art museum that owns a large volume of works of art. Each work of art is described by a unique item code, a title, a type, and a size. The size is further composed of height, width, and weight. A work of art is developed by an artist, but the artist for some works is unknown. An artist is described by a unique artist ID, a name, a date of birth, and possibly a date of death. Data are maintained about an artist only if that artist has works currently owned by the museum. At any point in time, a work of art is either on display at the museum, held in storage, away from the museum as part of a traveling show, or on loan to another gallery. If on display at the museum, a work of art is also described by its location within the museum. A traveling show is described by a unique show ID, the city in which the show is currently appearing, and the start and end dates of the show. Many of the museum works may be part of a given show, and only active shows with at least one museum work of art are to be represented in the database. Finally, another gallery is described by a unique gallery ID, its name, and its city. The museum wants to retain a complete history of lending for each work of art to other galleries, and, for each time a work is lent, the museum wants to know the date the work was lent and the date on which it was returned. Drawing manually (but neatly, in pencil), try to construct an E-R diagram for this database.