Calculate the volume of the solid obtained by revolving the region under the graph of f (x) = q/x + 8 about the x-axis over the interval [5, 13]. (Use symbolic notation and fractions where needed.) we Find the volume of a solid obtained by rotating the region under the graph of the function f (x) = 3c2 7x about the x-axis over the interval [0, 5]. (Use symbolic notation and fractions where needed.) Find the volume of the solid obtained by rotating the region enclosed by the graphs about the line x = 6. (Use symbolic notation and fractions where needed.) we Find the volume of the solid obtained by rotating the region enclosed by the graphs about the given axis. y = 2\\x, y = x, about y = 6 (Use symbolic notation and fractions where needed.) V =