1) Yes
Satan, and his fallen angels are real, as are demons.
2) Yes
This would be called temptation. He even tried to tempt Christ himself!
3) Yes
Several occurences of this in the Bible
4) I don't know.
I'm not sure how I feel about this one. Do I think we have the "right" to? and do I think we can on our own? No However, and I guess this kinda agress with the author, that we can ask that it be done in the name of God
never really thought about it before. As a human, we cannot do it, but with God's help we can, I guess would be my short, uninformed answer
