ACTOR (actor_id, first_name, last_name, last_update)

LANGUAGE (language_id, name, last_update)

CATEGORY (category_id, name, last_update)

FILM (film_id, title, description, release_year, language_id, length, rating, last_update)

FILM_ACTOR(actor_id, film_id, last_update)

FILM_CATEGORY (film_id, category_id, last_update)

COMMENTS (review_id, film_id, reviewer_name, comment, score, last_update)

Write the following queries in MYSQL, using the schema provided above.

Question - Find the reviewers that have reviewed movies in all the categories.