A research capsule of mass m is moved along the following path:
(a) For each transition listed above, state whether the weight of the capsule increases, decreases, or remains unchanged compared with the previous position, and justify your answer in not more than three sentences per stage.
(b) Considering all five positions (starting position plus the four new positions), list them in order of decreasing weight of the capsule, writing a short reason for the extreme (highest and lowest) values.