labs   = mark for labs        (out of 10)
quiz1  = mark for quiz 1      (out of 5)
quiz2  = mark for quiz 2      (out of 15)
ass    = mark for assignment  (out of 15)
exam_w = mark for written part of final exam (out of 20)
exam_c = mark for coding part of final exam  (out of 35)

mark   = labs + quiz1 + quiz2 + ass + exam_w + exam_c