A search and rescue helicopter lifts a distressed sailor of mass 85 kg using a cable from point A with cartesian coordinates ( x_A = 3.5 × 10³ m; y_A = 0 m) to point B with cartesian coordinates ( x_B = 2.2 × 10³ m; y_B = 18.5 m). Calculate the work done by the gravitational force during this rescue mission. Assume that the sailor is lifted up at constant speed.