I've tried asking questions like this too, but the scenario messes things up a lot of times.
It may be more direct to just ask "if you would be willing to sacrifice yourself for 4 other people if there was no way to save yourself"....but then the "it depends" answer is too easy.
Anyways, if the scenario was such that either all five of us end up dead or just I do, rationally, I would elect for just me. So I guess "cut off the rope," is my official answer. But in that scenario, i'd probably be to worked up to notice or think about any of this.