1. The problem statement, all variables and given/known data I have to sketch a vertical or horizontal strip and state an expression for the volume of the shell formed by its rotation. Do not solve y=x^2+1 x=0 y=1 x=1 around y=-1 2. Relevant equations 3. The attempt at a solution I'm really lost because I don't know how to get started. I think dy works but I cant get it right. Any help will be great thanks.