EXPLAIN SELECT last$\_$name, first$\_$name, ROUND$($AVG$($length$),0)$ AS average FROM actor INNER JOIN film$\_$actor ON film$\_$actor.actor$\_$id $=$ actor.actor$\_$id INNER JOIN film ON film$\_$actor.film$\_$id $=$ film.film$\_$id WHERE title $=$ "ALONE TRIP" GROUP BY last$\_$name, first$\_$name ORDER BY average;