A 750-kg person stands on a scale in an elevator. What does the scale read (in N and in kg) when the elevator is
(a) At rest,
(b) Ascending at a constant speed of 3.0 m/s,
(c) Falling at 3.0m/sm
(d) Accelerating upward at 3.0 m/s2,
(e) Accelerating downward at 3.0 m/s2?