2. Set up the requested integrals to find the work required to move a 200 lb, 25 ft chain from being suspended from a 15 ft ceiling (so part of the chain is on the ground to start), then folded in half twice. i.e. we take the bottom of the chain, attach it to the top part (such that it's folded in half), and then we take the bottom of the folder chain, and secure it to the top again.