A few questions about question tags. please help

[japanjapan]

Dear teachers,
Please read the following five sentences, what tags should I use, and WHY?
1. He has his hair cut every month, _______?
2. You did finish your homework by yourself, _______?
3. No one left here yesterday,_______?
4. I don't think you've told anyone,_______?
5. It's my son's wedding next week, and I have to look my best for that, _______?

I am looking forward to your instruction.
Thanks a lot

[Humble]

Hi,
Why not try it yourself first?
Cheers

[japanjapan]

Of course I tried. Ok, I will show my answers.
1. He has his hair cut every month, __doesn't he_____?
2. You did finish your homework by yourself, ____didn't you___?
3. No one left here yesterday,___did they____?
4. I don't think you've told anyone,____haven't you___?
5. It's my son's wedding next week, and I have to look my best for that, ____don't I___?

[Tdol]

1. He has his hair cut every month, __doesn't he_____?
2. You did finish your homework by yourself, ____didn't you___?
3. No one left here yesterday,___did they____?
4. I don't think you've told anyone,____haven't you___? have you?
5. It's my son's wedding next week, and I have to look my best for that, ____don't I___?