A \(60-\mathrm{kg}\) student is in an elevator moving downward with constant velocity. He uses a bathroom scale to measure the upward force exerted on his feet. What force magnitude does the scale read \((a)\) when the elevator is traveling at constant velocity, \((b)\) when the elevator slows to a stop with an acceleration of magnitude \(2.0 \mathrm{~m} / \mathrm{s}^{2}\), and

(c) when the elevator starts downward again with an acceleration of magnitude \(2.0 \mathrm{~m} / \mathrm{s}^{2}\) ?