ROUGH PROOF: Sitter 1ROUGH PROOF: Sitter 2ROUGH PROOF: Sitter 3ROUGH PROOF: Sitter 4ROUGH PROOF: Sitter 5ROUGH PROOF: Sitter 6ROUGH PROOF: Sitter 7ROUGH PROOF: Sitter 8ROUGH PROOF: Sitter 9ROUGH PROOF: Group 1ROUGH PROOF: Group 2