Overtime and Travel

Hi All, I've looked around on here and haven't found clear answers so I figured I'd post.

I'm looking at a combination of MBB and Big 4 internships for this summer. I currently have an offer from a Big 4 and I just finished final round with an MBB. I find myself having a few questions about the logistics of such programs.

1. Any guideline on how many hours a week people work? Most of the answer on here are old and I'm interested if it's changed at all.
2. Is travel time (in flight) paid? The positions I'm looking at would expect travel every week
3. For MBB internships it looks like salary figures are reported monthly, not hourly, is this how it is? If so, is that rated for a certain number of hours, are you paid overtime?
4. How does overtime work for interns? The offer I currently have says I will be paid overtime, but I haven't really heard anything about that from what I can find online. I expect to work more than 40 hours, but honestly I can't imagine them paying me for 15 hours a week at 1.5x pay (I can't even believe how high the 1x pay is).
5. I can't seem to find anything about housing allowance, so I expect there wouldn't be any, is this how it is?
6. I see on places like glassdoor they have a bonus reported for interns, is that actually a thing?

Thanks for helping to answer any of these questions (you don't have to answer all, just whatever you have info on) or any other relevant information you think I should consider or insight into making a decision between them if I get an offer from the MBB.