One of the users is called $$austenfan$.$ We want to investigate, based on

the books they$$ve rated, whether they are actually a Jane Austen fan.

$($a$)$ Write a query to output a list of the most commonly rated authors by this

user, the number of books per author the user has rated, and the list of book

titles from books for each author that has been rated by this user $($using array

aggregation$).$ The resulting table should have the following columns: author,

num$\_$rated $($number of books rated for this author$),$ rated$\_$books.

$($b$)$ Based on the results of your query, is $$austenfan$$ a Jane Austen fan? Why

or why not?