'Computes and returns whether the given percent value
is a passing grade according to the given grade cutoffs.'

@staticmethod
def _compute_passed(grade_cutoffs, percent):

    nonzero_cutoffs = [cutoff for cutoff in grade_cutoffs.values() if (cutoff > 0)]
    success_cutoff = (min(nonzero_cutoffs) if nonzero_cutoffs else None)
    return (success_cutoff and (percent >= success_cutoff))
