 MD    ba     ba
(3     5.5    2)
(4     7      2.8)
(5     8      3.5)
(6     10     4)
(8     13     5.5)
(10    17     7)
(12    19     8)
(14    22     9)
(16    24     10)
(18    27     12)  
(20    30     13)
(22    32     14) 
(24    36     15)
(26    40     16)
(27    41     17)
(30    46     19)
(33    50     21)
(36    55     23)
(39    60     25)
(42    65     26)
(45    70     28)
(48    75     30)   

(4.17   7     2.8)
(4.83   8     3.5)
(6.35   10     4)
(7.9375 13     5)
(9.525  17     6)
(12.7   21     9)
(15.875 26     11)
(19.05  32     13)
(22.225 35     15)
(25.4   41     18)
(28.575 46     20)
(31.75  50     22)
(38.1   58     27)
(41.275 63     30) 
(44.45  67     32)
(50.8   77     36)