Return the maximum support rate, minimum consider rate, and minimum oppose rate across all candidates?
return candidates ;return support rates of #1 ;return consider rates of #1 ;return oppose rates of #1 ;return maximum of #2 ;return minimum of #3 ;return minimum of #4 ;return #5 ,  #6 ,   #7
['select', 'project', 'project', 'project', 'aggregate', 'aggregate', 'aggregate', 'union']