Among the Yelp_Business in Arizona, how many of them closes at 12PM on Sundays?
in Arizona refers to state = 'AZ'; closes at 12PM refers to closing_time = '12PM'; on Sundays refers to day_of_week = 'Sunday'
SELECT COUNT(T1.business_id) FROM Business_Hours AS T1 INNER JOIN Days AS T2 ON T1.day_id = T2.day_id INNER JOIN Business AS T3 ON T1.business_id = T3.business_id WHERE T2.day_of_week LIKE 'Sunday' AND T1.closing_time LIKE '12PM' AND T3.state LIKE 'AZ'