Galleries keep information about artists, their names, ID, birthplaces, age and style of art. For each piece of artwork produced by the artist, the following information has been collected: the artist ID, the year it was made, its unique title, type of art (e.g., painting, lithograph, sculpture, photograph), and its price. Each artist may produce more than one artwork but each artwork is created by only one artist. Pieces of artwork are also classified into groups of various kinds, for example, portraits, still lives, works by Picasso, or works of the 19th century; a given piece may belong to more than one group. Each group is identified by group id and name (like those just given) that describes the group. Finally, galleries keep information about customers. For each customer, galleries keep that person's unique id, name, address, total amount of dollars spent in the gallery (very important!), and the artists and groups of art that the customer tends to like. a) Draw the entity relationship diagram together with their cardinalities, connectivity and the attribute for the above scenarios. (20 marks)