Read the dialogue and answer the question.

(1) Claire: Do you think we pack enough food?

(2) Chris: I don’t know… Should we pack more for the trip? I’ll take some from the fridge.

(3) Claire: It’s okay. We will buy some sandwiches if we’re hungry.

(4) Chris: Alright, let’s do that.

Which sentence(s) is/are in the first conditional?