Hi,
yes, this is a good place to clarify things about security. My problem is that in this case it looks like you are just preparing for an interview and you copied questions that you can't answer. There is nothing wrong about learning but this is just a lazy attempt to get the answers. What have you done so far to get answers? For example if you google for "STAUTHTRACE documentation" the first link should contain answer for your first question. The last question can be easily answered by executing SE54. Right? You should be able to answers all those questions with Google and common sense but it will require some effort from you.
Cheers