-AVERAGE( A1,A5,8) = 10
-AVERAGE( A1,A5)= 11
-AVERAGE(A1,A4,A1,2)= 5,75
-AVERAGE(A1,A5,5)= 9
-MAX(A1:A5)= 17
-MIN (A1:A5)= 5
-MAX(A1,A4,15) = 15
-MIN(A1,A4,15)= 5
-MAX(A1,A4,1)= 11
-MIN(A1,A4,1)= 1
3.
-SUM(A2,C2) = 3
-SUM(A2,C2,-4)= -1
-AVERAGE(A2,C2,6)= 3