Read the dialogue and answer the question.

(1) Tara: So, where are you going after this?
(2) Lucy: I’m going to the mall to give Zach his wallet.
(3) Tara: He forgot his wallet? Hahaha.
(4) Lucy: Haha, yeah. If my brother wasn’t so forgetful, my life would be easy.
(5) Tara: If my sister was like you, I would be very thankful.
Which sentence(s) is/are in the second conditional?