Compute all parts of given question:

Question: A physics student, who weighs 529.0 N stands on a bathroom scale in an elevator that is supported by an elevator cable; the mass of the elevator, including the student inside, is 853.0 kg. While the student is standing on the scale, the elevator makes an upward trip, followed by a downward trip.

Part A: Find the magnitude of the acceleration of the elevator at the instant of time when the scale reads 405.0 N.

Part B: What is the tension in the elevator cable in Part (A)?

Part C: What is the magnitude of the acceleration of the elevator if the scale reads 694.0 N?

Part D: If the scale were to read only 4.00 N, what would be the magnitude of the acceleration of the elevator?

Please use as much detail as possible in your answer. Thank you.