Here is a set of basic questions producing integer or string outputs. Answer them and format the result precisely with the JSON instructions provided:

Question 0 (Question id: q_s8ojh):
Calculate 7 + -3 + 6.

Question 1 (Question id: q_76hdT0P6):
How many times does the letter "b" appear in the text: "library of"? Respond with an integer.

Question 2 (Question id: q_iGh1Wk3):
Calculate ( -3 + 7 ) / 2.



Output JSON where all question ids are keys, omitting q_s8ojh.

For every question id, supply an object whose 'answer' field stores the solution.
If the response to a question is an integer that is even, add the field 'additional_answer_info' containing 'half_answer' (answer ÷ 2) and 'double_answer' (answer × 2).
If the response to a question is a string, add a 'first_char' field containing its first character.

Now provide the result JSON using the described format.

{"ground_truth": {"q_iGh1Wk3": {"answer": 2, "additional_answer_info": {"half_answer": 1, "double_answer": 4}}, "q_76hdT0P6": {"answer": 1}}}