What are the titles and average ratings for all movies that have the lowest average rating?
return movies ;return ratings of  #1 ;return average  of  #2 for each  #1 ;return #1 where #3 is  lowest ;return titles of  #4 ;return ratings of  #4 ;return average  of  #6 for each  #4 ;return #5 ,  #7
['select', 'project', 'group', 'superlative', 'project', 'project', 'group', 'union']