<image>As shown in the figure, there is an iron tower AB at the top of a slope, and under sunlight, the shadow of the tower DE is cast on the slope. Given that the base width of the tower CD is 14m, the length of the tower's shadow DE is 36m. Xiaoming and Xiaohua both have a height of 1.6m. Xiaoming stands at point E, and his shadow is also on the slope. Xiaohua stands at the foot of the slope along the direction of DE, and his shadow is on the flat ground. The lengths of their shadows are 4m and 2m respectively. Find the height AB of the tower.