19 - 27 + 5 = -3. It is 3 meters below the canyon wall
The helicopter , which was originally 19 meters above the canyon wall, descends 27 meters into the canyon and then ascends 5 meters. This places it at a position 3 meters below the top of the canyon wall. ;
The helicopter ends up 3 meters below the top of the canyon wall after going down 27 meters and then up 5 meters. Initially, it was 19 meters above the wall. After the movements, its final position is -3 meters relative to the wall.
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