Nhạc jazz có dài không?

SELECT
	-- Find the genre name and average milliseconds
    ___,
    ___ AS average_milliseconds
-- Retrieve records from the result of the subquery
___ (
    SELECT
        genre.name AS genre_name,
        track.genre_id,
        track.milliseconds
    FROM store.track
    JOIN store.genre ON track.genre_id = genre.genre_id
)
-- Group the results by the genre name
___ ___ ___;