The right thing to do would be to social distance yourself test if you have any of the symptoms stay at home only go out when necessary
12, you would have 12 half size pie pieces because 1 pie broke in half is 2 half pie pieces therefore if you have 6 pies you cut them all in half and you have 12 half pie pieces.
To be honest, I think it might possibly be the third option. I hope this helps.