Finding the Volume of a Solid In Exercises 21-24, find the volume of the solid generated by revolving the region bounded by the graphs of the equations about the line x = 5. 21. y = x, y = 0, y = 4, x =5 22. y = 2 - y = 0, y= 1, x=0 23. x = 12, x = 4 24. xy = 3, y = 1, y = 4, x = 5