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The volume of the solid obtained by rotating the region enclosed by x = 2, x=7, y=0 about the line * = 9 can be computed using the method of cylindrical shells via an integral V = dx a with limits of integration a = 2 and b = 7 The volume is V = 1720 2 cubic units. Note: You can earn full credit if the last question is correct and all other questions are either blank or correct.The region between the graphs of y = x2 and y = 4x is rotated around the line x = 4. The volume of the resulting solid is