What are the movie titles with the highest average rating and what are those ratings?
SELECT T2.title ,  avg(T1.stars) FROM Rating AS T1 JOIN Movie AS T2 ON T1.mID  =  T2.mID GROUP BY T1.mID ORDER BY avg(T1.stars) DESC LIMIT 1
En yüksek ortalama dereceye sahip film başlıkları nelerdir ve bu derecelendirmeler nelerdir?