Alice, Bob, Charlie and Dianne each make the following statements:

**Alice**: I am telling the truth.**Bob**: Alice is telling the truth.**Charlie**: Bob is telling the truth.**Dianne**: Charlie is lying.Only one of the four people is telling the truth. Which one? Explain your answer.

They now make the following statements:

**Alice**: Bob is lying.**Bob**: Charlie is lying.**Charlie**: I like beer.**Dianne**: 2+2=4.Now two of the four people are telling the truth. Which two? Explain your answer.

They are now joined by Egbert. They each make the following statements:

**Alice**: I like wine.**Bob**: Charlie is lying.**Charlie**: Alice is lying.**Dianne**: Alice likes beer.**Egbert**: Alice likes beer.Now three of the five people are telling the truth. Which ones? Explain your answer.