Knights, Knaves and Spies

On this island, there are three types of people. Knights, who always tell the truth, knaves, who always lie, and spies, who can do either. In these puzzles, you meet three people, one knight, one knave and one spy. The challenge is to determine who is who. These puzzles can easily be found online, so don't look. I will post a link to a site with many variations of these puzzles on Thursday. The last two are tricky. Think about what would be true in order for the knave to say that. Good luck and have fun!

1. A says "I am a Knight"
   B says "I am not a Spy"
   C says "I am a Knave"
2. A says "I am a Knight"
   B says "I am a Knave"
   C says "B is not a Knight"
3. A says "I am a Knight"
   B says "I am a Knave"
   C says "B is a Knight"
4. A says "I am a Knight"
   B says "A is a Knight"
   C says "If you asked me, I would say that A is the spy"
5. A says "I am a Knight"
   B says "C is a Knight"
   C says "If you asked me, I would say that A is the spy"