Three students are debating: student a: the pressure at level c must now be greater than the atmospheric pressure because liquid there is being pushed up against the stopper. student b: i think the pressure at level b must be the same as at level a, because they are at the same level. both are at atmospheric pressure. so the pressure at level c must be lower than atmospheric, because pressure decreases as you ascend. student c: but the liquid is denser than air, so the pressure at c cannot be less than atmospheric pressure. with which student(s) should you agree?