None of them sound particularly difficult to answer. Maybe they are difficult to answer in sufficient detail to satisfy the NHTSA, but you can always start out by answering them as best you can, and then seeing if they want more. There are people on the other end of this letter, not some unthinking machine. Toss off a quick response and say, "If you have any other questions or need further detail on the answers given here, please feel free to contact me at any time."
Here's a nicely readable transcript of what they wanted:
https://news.ycombinator.com/item?id=12817061
None of them sound particularly difficult to answer. Maybe they are difficult to answer in sufficient detail to satisfy the NHTSA, but you can always start out by answering them as best you can, and then seeing if they want more. There are people on the other end of this letter, not some unthinking machine. Toss off a quick response and say, "If you have any other questions or need further detail on the answers given here, please feel free to contact me at any time."