Anything can happen. I see 3 scenarios
1) Jake will start running and making Mike tired. He will try to use his age advantage. In late rounds he will do some damage to slowed Mike. Probably Mike will have a cut. And it will be a Jake winning by split decision
2) Jake will start with furious actions from very start. His goal will be to surprise Mike, who hasnt been in real fight for years. With enough unaswered punches, Jake could take some rounds (especially if he manages to daze Mike), and then survive till the end and win by decision.
3) Mike, as more experienced, will block avoid and wait, and later land either a body punch and win by TKO, or will win by TKO after Jake would had two knockdowns in one rounds. I really doubt that ref will allow a clear knockout, and Jake would be so silly to walk with hands down against such a striker.
Well, whatever happens with the 3 scenarios that you shared, one thing is for sure.
Both fighters will be happy in the end because they will be paid big time, and fans will be happy to see their idol fighting each other.
Kidding aside, I wonder if Mike Tyson can survive the whole fight, and winning by decision. I believe that his stamina is low compared to Jake Paul because of his age like you said. I know that Tyson is a strong fighter, but that was "IN HIS PRIME". Yes, we are seeing videos of him online showing that he can fight Jake Paul and potentially win, but I still believe that "AGE MATTERS" and Jake Paul isn't like an amateur, but he has an experience in boxing already (although not that much compared to Tyson).
But between the 3 scenarios that you shared; I will go with the 4th one which is "Jake Paul will win by TKO".