Yes, you can. There are some ways to do it without leaving a trace for the person who posted the story.
Technically, you could, but it's not recommended. Instagram has measures in place to prevent such actions, and if you're caught, you could face consequences like account suspension or other penalties.
Well, it's possible but it's not straightforward. You might need to use certain privacy settings or third-party apps, but there are risks involved and it could violate Instagram's terms of use.