Code Challenge: Aggregate Functions - Code Challenge 3

hello All,

i tried all the solutions and at the end … there is no result … here is the code i typed

SELECT ROUND (watch_duration_in_minutes) AS ‘duration’, COUNT (watch_duration_in_minutes) AS ‘count’
FROM watch_history
GROUP BY watch_duration_in_minutes
ORDER BY 2;

where could be the mistake ??

Best regards,