ABC Gallery keeps information about artists, their names $($which are unique$),$ birthplaces, age, and style of art. For each piece of artwork, the artist, the year it was made, its unique title, its type of art $($e$.$g$.,$ painting, lithograph, sculpture, photograph$),$ and its price must be stored.o Each artwork has been made by one artist. Pieces of artwork are also classified into groups of various kinds, for example, portraits, still lifes, works by Picasso, or works of the $19$th century; a given piece may belong to more than one group. $($i$.$e$.,$ GROUP:ARTWORK $=$ M:N$)$o Each group is identified by a name $($like those just given$)$ that describes the group. Finally, galleries keep information about customers and their preferences.o For each customer, galleries keep that persons unique id$,$ name, address, total amount of dollars spent in the gallery $($very important!$),$ and the artists that the customer tends to like $($i$.$e$.,$ CUSTOMER:ARTIST $=$ M:N$)$