For number 3: The answer to this question is called an infinite regression because there is but isn't a definite answer for this. It's just like the Liar Paradox. The question asks that you or a man take on a mission in which he has to not accept the mission and if he would accept the mission. This is the infinite regression answer as follows:
(In first person perspective) If I accept the mission, then I am not accepting the mission, but if I am not accepting the mission, then I have already taken the mission, in which I haven't accepted the mission because I have just accepted the mission but because I have accepted the mission, I haven't accepted the mission, but I have accepted the mission by not accepting the mission, but.............
This answer goes on forever and doesn't stop which makes it an infinite regression answer.