The grades below have been determined by the correct version of the computer program.
I initially ran it with wrong weights.

FINAL RESULTS
 AVERAGE SCORE =    75.5437546    
 STANDARD DEVIATION =    21.4641628    
 No, Exams, Quizz, Final, Final Score Grade, Place in Class
  1      60   28    8.52    58    57.84   C     14
  2      94  100    9.77    98    97.54   A+     3
  3      48   70    5.84    82    68.08   B+    11
  4      77   86    8.68    37    64.76   B-    13
  5      97   97    9.78   100    98.36   A+     2
  6      86   57    9.19    62    71.78   B+    10
  7      86   73    9.22    90    86.24   A+     7
  8      92   88    9.27    96    92.94   A+     4
  9      50   59    6.57    81    67.34   B     12
 10       2    2    4.85     3    11.70   F     16
 11      87   72    9.14    95    88.08   A+     6
 12      93   82    8.54    92    88.88   A+     5
 13      70   64    8.27    84    76.94   A      9
 14      63   28    8.09    55    56.38   C     15
 15      97  100    9.79   100    98.98   A+     1
 16      84   82    9.43    77    82.86   A      8