Well the question does assign ownership to the pizza, so Marty can eat his pizza then give it to Luis making it his pizza
I think meant agent like flight attendant, not like air marshall, although I would be okay with giving them this authority.
Seems like the power companies should be responsible for either checking there is no back feeding or provide those things for everyone then. (I'm still not advocating for you back feeding your home)
The Japanese domestic market?