prs grades<>quiz grades<>HW grades<>overall grades
    ID     T1  T2  T3  T4  average points  exam
1705-977 120 116 121 114 119.000  57.120    34
3759-838 107 101  90  89  99.333  47.680    27
2096-287  90  93  76  97  93.333  44.800    26
4367-468  62  53  31  29  48.667  23.360    15
9832-990  40  39  60  13  46.333  22.240    11
0149-073 103  71  56 104  92.667  44.480    26
4564-103 125  89 115  82 109.667  52.640    25
3194-262  63  48  68  80  70.333  33.760    26
0473-563  80  91  88 103  94.000  45.120    22
1992-085  70  65  49  24  61.333  29.440    17
2265-473  66  71  31   0  56.000  26.880     0
8472-789  82  71  54  55  69.333  33.280    17
5023-988  48  49  57   0  51.333  24.640     0
5100-053  60  55  59  47  58.000  27.840    18
 average is out of 125; points are out of 60
 exam score is number correct out of 40