I have seen variations of this a couple of times, but this particular case is quite blatant.
The questioner went from a somewhat reasonably sounding homework question to something that has no context and makes no sense at all.
I feel tempted to revert the question one or two versions back, and I would if it had not been the questioner himself that made the changes.
What should be done? Prod the questioner to edit it again, or simply revert it?