To find the total area of the composite figure, we need to break it down into smaller shapes, and then add up their areas.
The five-sided figure can be divided into a rectangle and a triangle. The rectangle has a base of 18 meters and a height of 12 meters, so its area is 18 x 12 = 216 square meters. The triangle has a base of 7 meters and a height of 12 meters, so its area is 0.5 x 7 x 12 = 42 square meters.
The other portion of the figure is a trapezoid. To find its area, we need to find the average of the two parallel sides (18 meters and 5 meters), which is (18 + 5) / 2 = 11.5 meters. The height of the trapezoid is 12 meters. The area of the trapezoid is 0.5 x (18 + 5) x 12 = 138 square meters.
Therefore, the total area of the composite figure is:
216 + 42 + 138 = 396 square meters
None of the answer choices are correct. The closest answer choice is 416 m2, but the actual answer is 396 m2.