Write SQL query to solve given problem: How many business have low check-in on Sunday at 10AM?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT COUNT(T2.business_id) FROM Days AS T1 INNER JOIN Checkins AS T2 ON T1.day_id = T2.day_id WHERE T1.day_of_week = 'Sunday' AND T2.label_time_10 = 'Low'