英文IQ题..谁是 Italian谁是Swiss?

英文IQ题..谁是 Italian谁是Swiss?
. You're hiking along a trail in the Swiss Alps. Across a ravine, you see three other hikers. Suppose that the only hikers in that area are either Swiss or Italian and that Italians lie all of the time and the Swiss tell the truth all of the time. You shout across to the one farthest to the right, 'What's your nationality?' That hiker says something, but the wind picks up and you can't hear it. The one to their left says, 'She said she's Swiss, and so am I.' At which point the one farthest to the left chimes in, 'They're both lying; I'm Swiss, and they're both Italian.'
Who's Swiss and who's Italian? For full credit, you must justify your answer