I would begin by plotting the region to be revolved:
Can you give an element of the volume \(dV\) if we are to use vertical rectangles (disk method)? That is, what will be the volume of an individual disk?
Welcome to the forum.
Here at FMH we prefer that the student solves their own problem with the assistance of the helpers here.
This means that you should tell us where you are stuck by showing us the work which you have tried--even if you know it is wrong.
For part a I would start by drawing vertical strips and then answer MarkFl's question? Also please include a drawing of what you are trying to do. Thanks!
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