Answer:
2 and 3 but check with another comment too
Explanation:
True(I really dont know i just wanted to finish the thing)
Calpurnia's cot shows how segregation is everywhere in Maycomb, including the Finch home.
We know that Aunt Alexandra has somewhere to sleep when she stays with them, suggesting that they have a spare bedroom. However, when Calpurnia stays with the Finches, she is not allowed to stay in the spare room.
Irony is like sarcasm: you can say "oh yeah, that sounds SO fun" and mean "that doesn't sound fun at all"
Irony in a situation is when, for example, you do everything you can to prevent something from happening, but your trying to prevent it is what makes it happen.
It is also a literary technique, originally used in Greek tragedy, by which the full significance of a character's words or actions are clear to the audience or reader although unknown to the character.