BMW won't hire you.
Answer 2 earned 1 yuan. Buy 8 and sell 9, earn 1 yuan, repurchase 10, that is, sell 9, repurchase 10, lose 1, sell 1 1, earn 1.
Answer 3: The chicken that could have been bought for 8 yuan was bought at 10, and lost two pieces; We could have 1 1 sold it, but we sold it on the 9th, and we lost 2, making a total loss of 4. Plus 2 yuan, who earned before, lost 2 yuan in total.
From the perspective of general economics, BMW will hire people who answer the third question.