Taken from question 4 and 5 of this URL: https://japanesetest4you.com/japanese-language-proficiency-test-jlpt-n1-listening-exercise-5/
QUESTION 4: The audio starts with: あ～ぁ、やってらんないよなあ。 I usually feel pretty confident with spoken Japanese contractions, but I can't make heads or tails of what this statement is. What is "やってらんない" short for?
The statement and three possible responses are:
The correct answer is 1, although I'm confused why 2 wouldn't be the better answer.
My translations are: This meal wouldn't be enough for two people. 1: Yeah, but I'm not feeling hungry. 2: It was plenty for one. 3: I really can't eat it all.
What am I missing here?