A solid is contructed so that one side is the region between the lines x = a, x = b, the graph of y = f(x) and the x-axis, and the cross-sections of the solid perpendicular to the x-axis are rectangles with base 5 (as shown in the figure). Which of the following integrals represents the volume of this solid? O f*5n (f(x))² da fr ( f(x)) ² dæ o [*5f(z) dz °f*5(f(x))²³ da y=f(x) each slice is a rectangle b X

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