IN this homework section we usually require that you show your try first, to get at least some of the results and then we can help from there in most cases. You might want to do one circuit at a time, starting with the first one.
Your attempt might show us how they want you to use Is for example, given that N is actually not given when usually it is when Is is. They might want you to use the Spice default value for example, but your attempt would show us that one way or the other. If you need help getting started then you might mention what it is that you dont know that would help you to start doing these.
So what are you expecting to happen here? You post your homework problem and someone is going to solve it for you and post a complete solution?
This is Homework Help, not Homework Done For You.
YOU need to post YOUR best attempt to work YOUR homework. Then we can see what you are doing right and wrong and HELP guide YOU toward a solution that YOU have earned and understand.
Just in case you where not able to get started yet, start by computing the DC voltages for each circuit. If you even have trouble with that then you'll have to let us know.