A Number Pyramid is composed of the 10 different numbers 0-9 with
a top row of 1 number resting on a second row of 2 sitting on a third row
of 3 supported by a bottom row of 4.  For example, a Number Pyramid
could be:
  
     0 
    1 2 
   3 4 5 
  6 7 8 9 
  
Given the clues below, can you determine the composition of Number
Pyramid 4?
 
-  The middle number in row 3 is less than at least two of the numbers
in the bottom row of the Pyramid.
 -  The rightmost number in row 4 is greater than the number to its
immediate left in the row.
 -  The difference between the higher and lower numbers in row 2 is 2.
 -  In row 4, subtracting the higher and the lower of the two leftmost
numbers equals 3.
 -  The three numbers in row 3 sum to 20, as do the four numbers in row 4.
 -  The sum of the number in row 1 and the numbers leftmost in rows 2, 3,
and 4 totals 9.
  
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