Cells: A16 = 5, A17 = 5, A18 = 5, A15 =sum(A16:A18)/3 = 5
A20 = 2, A21 = 2, A22 = 2, A19 =sum(A16:A18)/3 = 2

F2 = (A15+A19)/2 =3.5

Herein lies the problem: In cell G2 I have the following formula:
=IF(F2=5,3,IF(F2=4,3,IF(F2=3,2,IF(F2=2,1,IF(F2=1,0 ,0)))))
If all A cells = the same number then cell G2 works, but when the A cells
have different numbers such as above, it does not calculate?