What is the default world state in Witcher 3, regarding decisions from Witcher 2?

the-witcher-3

After researching on the web for a good hour I stumbled across some of the answers and I will collect them here:

  1. Aryan LaVlette was killed
  2. Sided with Roche at the end of chapter 1
  3. unknown :/ this is the only point that I couldn't find
  4. Sile de Tancarville is dead
  5. Letho was killed

If I find the answer to 3 I will update this answer. This is completely based on a lot of forum posts and some people who played through the default world state.

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