Hello there, for the 2nd one, I personally choose milk-apple-cake which leads me into the Snack ending, then Udon, Steak and Leave. Just my way of making sure I don't miss anything. You might miss out the Leave ending for 2nd playthrough?
For the 5th one, you'll need to save during the game, i.e. when you're facing Akira, through the quick menu.
Hope that helps! :)