A student of mass \(m\) stands on a platform scale in an elevator that is moving upward at a constant speed. As the elevator approaches the top floor, it slows down with a constant acceleration of magnitude \(a\). Which of the following correctly compares the magnitude of the normal force \(F_N\) exerted by the scale on the student to the student's weight \(mg\) while the elevator is slowing down, and provides a correct physical justification?