A thin rectangular metal plate with width B is folded so that it gets a trapezoidal shape when seen from the front as shown in the figure. Implied: B = 2x+y What is the maximum cross-sectional area of the trapezoid (yellow-shaded field)? Remember: Area of trapeziod, a = (a + b)h. Find the area expressed by x and 0 Answer alternatives: A = a) 12 A = b) c) 12 A- d)