Explain the juxtaposition between the forced labour camps and the Party’s society

I have several questions and I guess making one post would be best.

1)Explain the juxtaposition between the forced labour camps and the Party’s society

2)What has Ampleforth done and why would his crime be so upsetting to the Party?

3)Briefly summarize Winston's time in the holding cells. Explain the importance of each interaction he has.

4)What is in room 101? Explain the reasoning behind your answer

5)Explain what Winston has “always known” about O’Brien and HOW he knew it.

6)Why do you think Orwell includes the last passage in chapter 1 about pain?