Please choose the correct solution to the question: How do I do sit ups

Solution1: Lay your ear against the ground, bring your knees up to a 90 degree angle then go up and down against your legs back to the ground

Solution2: Lay your back against the ground, bring your knees up to a 90 degree angle then go up and down against your legs back to the ground

Answer format: solution1/solution2
Answer: solution2