Abell tower is 17 meters tall. it casts a long shadow on the ground below. the tip of the shadow of the bell tower is 51 meters from the base of the bell tower. at the same time, a tall elm tree casts a shadow that is 63 meters long. if the right triangle formed by the tower and its shadow is similar to the right triangle formed by the elm and its shadow, how tall is the elm to the nearest tenth?