示すものを教えていただけますでしょうか。

(4)～(8)のtheir, themselves,it,it,that,が表す物を文から抜き出して欲しいです
1. I hate to hear people criticize someone else behind 4)their back. If you have a problem with someone’s behavior, you should say so directly to that person. Then the criticized person may have a chance to reflect on 5)themselves sincerely and become a better person. Malicious gossiping is fruitless.
6)It delights me when people notice 7)it when I have done something good without intending 8)that to be noticed.