What is the closing and opening time of businesses located at Tempe with highest star rating?
located at Tempe refers to city = 'Tempe'; highest star rating refers to max(stars)
SELECT T2.closing_time, T2.opening_time FROM Business AS T1 INNER JOIN Business_Hours AS T2 ON T1.business_id = T2.business_id WHERE T1.city LIKE 'Tempe' ORDER BY T1.stars DESC LIMIT 1