Casey S. answered 05/03/23
Learn from an Experienced Professional Programmer, UC Berkeley Grad
Hi, can you double check that you've reproduced the problem correctly? There might be an issue with it as written.
Once you verify that, you can proceed with a problem like this by making a diagram of the table, something like this (I hope it's formatted correctly):
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Using the diagram, fill in the known information. You can start by picking a given fact like "R is sitting second to the left of Q", putting Q in any position on the diagram, then putting R 2 seats to the left of Q. Using any other facts about Q and R, fill in additional known positions.
Continue this process with any other letters you've added to the diagram based on the facts until you've added as many as you can. When you're absolutely sure a letter is in the correct position, indicate this by bolding it, underlining it, or marking it some other way. You'll need to keep track of what you know for sure, because there might be some trial and error as you continue to fill out the diagram.
Now that you have some letters filled in, you can go back over the facts to start filling in the remaining positions. At this stage, there will likely be multiple possibilities that work for some positions. Choose one of the possibilities and try it out, filling in your choice of letter(s) as a guess without marking it correct. Now return to the facts as before, continuing to fill in letters until the entire diagram is filled in or you're unable to continue because there is a contradiction.
If you were able to fill in the whole diagram, check it one more time against the facts to confirm it's correct and you're done. If you weren't, erase your guess and try one of other possibilities. Repeat until there are no contradictions and the diagram is correctly filled in.
I hope that helps you get started. Let me know if you need any additional help.