A. The muscle generates force in terms of passive force in where the muscle does react to the electrical stimulus but the weight of the load pulling downwards would not allow the muscle to visibly move.
B. If the platform that supports the weight is removed, and the 2.5g weight is still connected, the weight would pull the muscle downwards causing it to lengthen. The muscle changing length would not be from the result of muscle contractions, but only from the weight pulling down.