What would you do ?

1 I give it to the senior citizen first but by the look at all the space on those benches I'd let them all three of them sit down the guy can deal with it

what seat? my seat?

Number 4, that way when the baby gets fidgety (and he or she will) they will at least be seated, also when the mother needs to breastfeed!

None. I stopped caring a long time ago.

1,4,2,3, or 1,2,4,3.