What are the average amount purchased and value purchased for the supplier who supplies the most products.
return suppliers ;return products of #1 ;return number of #2 for each #1 ;return #1 where #3 is  highest ;return amounts purchased  of #4 ;return average of #5 ;return value purchased  of #4 ;return average of #5 ;return #6 , #8
['select', 'project', 'group', 'superlative', 'project', 'aggregate', 'project', 'aggregate', 'union']