A scuba diver makes a slow descent into the depths of the ocean. His vertical position with respect to a boat on the surface changes several times. He makes the first stop 7 m from the boat but has a problem with equalizing the pressure, so he ascends 3 m and then continues descending for another 7 m to the second stop. From there, he ascends 4 m and then descends for 17 m, ascends again for 7 m and descends again for 19 m, where he makes a stop, waiting for his buddy. hat is his net vertical displacement from the boat in meters? Let up be the positive direction.