Check these, please!

[Anonymous]

Hi,
Please check these sentences and correct them.
1. My coming late [provoked Jim, made Jim angry].
2. I heard Tom succeeded (it). If Tom can do it, I think you can, too. [Please rephrase this into a natural one.]
3. I would like to go back to the past when my mother was a teenager. I would like to see her in that era / at that time.
4. The study was still at the fact-gathering stage, and we hadn't reached any conclusions.
5. He is bald by nature. or He is voluntarily/involuntarily bald. [Which is correct, voluntarily or involuntarily?]
Thanks a million.
Ann

[Rusty]

1. My coming late [provoked Jim, made Jim angry]. (OK).
2. I heard Tom succeeded (in doing it). If Tom can do it, I think you can, too. [Please rephrase this into a natural one.](You can replace in doing it with whatever he did).
3. I would like to go back to the past when my mother was a teenager. I would like to see her in that era / at that time. (OK).
4. The study was still at the fact-gathering stage, and we hadn't reached any conclusions. (OK).
5. He is bald by nature. (OK).
or He is voluntarily/involuntarily bald. [Which is correct, voluntarily or involuntarily?] (Neither. The common expression is: He is naturally bald).