Show the average, minimum, and maximum ticket prices for exhibitions for all years before 2009.
return exhibitions ;return years of #1 ;return #1 where #2 is lower than 2009 ;return ticket prices of #3 ;return average of #4 ;return minimum of #4 ;return maximum of #4 ;return #5 ,  #6 ,   #7
['select', 'project', 'comparative', 'project', 'aggregate', 'aggregate', 'aggregate', 'union']