6) We'd like to better understand the preferences of a segment of movie watching users. We are particularly interested in those users who have an occupation of 'Engineer'. For these 'Engineer' users, we want to know more about their favorite movies - the top five rated movies (where a rating of 5 is the best). We would like to consider only those movies which have a significant amount of ratings, so let's say at least 20 Engineers must have rated a movie for the movie to be considered in the top 5. So, in summary, write a query to return the top 5 significant movies as rated by 'Engineers'.
