 D   T  D2  D3    N     S 
(16   8  20  10.5  21  10)
(20  10  26  12.5  26  12)
(25  12  31  14.5  30  14)
(30  14  38  16.5  34  16)
(35  16  43  16.5  36  16)
(40  18  48  16.5  38  16)