Find the id and city of the student address with the highest average monthly rental.
SELECT T2.address_id ,  T1.city FROM Addresses AS T1 JOIN Student_Addresses AS T2 ON T1.address_id  =  T2.address_id GROUP BY T2.address_id ORDER BY AVG(monthly_rental) DESC LIMIT 1
En yüksek ortalama aylık kiralamaya sahip öğrenci adresinin kimliğini ve şehrini bulun.