exam exercise1 exercise2 bonus exampoints = if exercise1 && exercise2
                            then rawexam (bonus + exampoints)
                            else rawexam exampoints

rawexam points
    | points < 50   = 5.0
    | points < 54   = 4.0
    | points < 58   = 3.7
    | points < 62   = 3.3
    | points < 66   = 3.0
    | points < 70   = 2.7
    | points < 74   = 2.3
    | points < 78   = 2.0
    | points < 82   = 1.7
    | points < 86   = 1.3
    | points <= 120 = 1.0