Some Life and Death

So, I recently started doing some more serious studying. I went through a bad breakup and the only things that kept me going for a while were God, my mom, and Go. So while I was going through this rough patch, I picked up some Life and Death.
Here are a few examples. One of them is pretty easy, if you know the answer. If you don't, it will probably take quite a while to see it, even though it's very obvious immediately afterwards.

Black to kill.


Black to live.

I'll try to post solutions soon. You may have to wait a while on the second one while I figure out what it is!

Good luck solving them!