Using Map T-1, the "Hawaii, Hawaii," topographic map (scale 1:250,000; contour interval 200 feet), calculate the gradient of Mauna Loa (19 degrees 28' 17" N, 155 degrees 35' 41" W) along line AB, from the 5000 ft, contour (near Point A) toward the summit. On the edge of a piece of paper measure out a distance of 10 miles using the graphic map scale, and then determine the elevation change over that distance.