question: What are the average amount purchased and value purchased for the supplier who supplies the most products.
#1 return suppliers 
#2 return products of #1 
#3 return number of #2 for each #1 
#4 return #1 where #3 is  highest 
#5 return amounts purchased  of #4 
#6 return average of #5 
#7 return value purchased  of #4 
#8 return average of #5 
#9 return #6 , #8