29. CHALLENGE Use these statements to answer parts (a) - (c) . Adam says Bon lies . Bob says Charlie lies. Charlie says Adam and Bob both lie.

a. If Adam is telling the truth, then Bob is lying. What can you conclude about Charlie's statement ?
b. Assume Adam is telling the truth. Explain how this leads to a contradiction know?
c. Who is telling the truth? Who is lying ? How do you know?