We now have your BSD-disklabel partitions as (Size and Offset in MB):
 
    Size      Offset    End       FStype Bsize Fsize Mount point
    --------- --------- --------- ------ ----- ----- -----------
 a: 32        0         31        4.2BSD 8192  1024  /
 b: 64        32        96        swap   
 c: 348       0         347       unused 
 g: 251       97        347       4.2BSD 8192  1024  /usr


 We now have your BSD-disklabel partitions as (Size and Offset in MB):
 
    Size      Offset    End       FStype Bsize Fsize Mount point
    --------- --------- --------- ------ ----- ----- -----------
 a: 100       0         99        4.2BSD 8192  1024  /
 b: 79        100       179       swap   
 c: 348       0         347       unused 
 d: 0         0         0         unused 
 e: 0         0         0         unused 
 f: 0         0         0         unused 
 g: 168       180       347       4.2BSD 8192  1024  /usr