22 5+ 4- f(x) 0 2 3 4 5 6 7 8 9 -1+ -24 -3- - 4 - 5+ The graph above is of the function f(x). The region bounded by the x-axis, f(), and the lines z = 3 and > = 7 form the base of a solid whose cross sections perpendicular to the x axis are squares. Determine the integral used to find the volume of this solid. 7 3