rank userid    q1 2a 2b q3 sum
     1  isc07211  40 15 15 30 100
     1  zhangxin  40 15 15 30 100
     3  chenting  40 15 13 30  98
     3  wangying  40 15 13 30  98
     5  zhuyi     40 15 11 30  96
     6  akashkum  40 15 10 30  95
     6  zhuwenbi  40 15 10 30  95
     8  zhoujing  40 15 10 20  85
     9  phanthix  20 15 15 30  80
    10  jonathan   0 15 10 28  53
    11  kohchung   0 15 15 10  40
    12  trantuan   0 15 10 10  35
    13  lohyeong   0 15  0 15  30
    14  ouyongji   0 15  0  0  15
    14  trianaku   0 15  0  0  15
    16  johansya   0  0  0  0   0