I am trying to fill out N-400. I have couple quesitons. As I read the instruciton, it says I should put none if i don't have any child. Should I put none or 0. And, I just wonder if I can leave blank on the quesitons that are not applicable to me. Or I have to put N/A to every single box. For example, I don't have second marriage, should I put N/A to all the boxes in that part
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