I see only 2x1 seating. At some point (middle of car?) the single seats switch sides.Found it; Picture was taken by Brian Yueue on the Amtrak Modelers Facebook Group.
Looking at it, Crowbar_k is correct (I had forgotten) it's 2-2 Coach seating, then 2-1 Biz, the seats still look identical, just a bit wider. I'm also surprised that there isn't a divider between coach & biz.
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