Please choose the correct ending to complete the given sentence: Doing crunches: He is trying to do sit ups, slowing down and grimacing as the effort becomes more difficult with each one. he

Ending1: eventually gives up, swinging his legs back to the ground, letting the weights fall, and looking up. Ending2: stops, lying back and laughing. Ending3: is trying very hard to do sit ups correctly and he has difficulty but he decides to do them anyways and then falls over. Ending4: finally gets to free up his legs and starts to sit on the edge of the bench.

Answer format: ending1/ending2/ending3/ending4