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_P721JKt8):
Calculate 2 + -2.

Question 1 (Question id: q_FypJ):
Determine the value of n that satisfies: 13 - 5*n = -67 Respond with an integer.

Question 2 (Question id: q_VaODZb):
Calculate 9 / 1.



Return a JSON with each question id (except for q_FypJ) as a key.

Each key’s value must be an object holding an 'answer' field.
Also add the answer type as 'string' or 'integer' to the field 'answer_type' for each object.
For even integers, nest 'half_answer' and 'double_answer' inside an additional 'additional_answer_info' field in the answer object.
For string answers, include 'first_char' with the answer’s initial letter.

Now provide the result JSON using the described format.

{"ground_truth": {"q_P721JKt8": {"answer": 0, "answer_type": "integer", "additional_answer_info": {"half_answer": 0, "double_answer": 0}}, "q_VaODZb": {"answer": 9, "answer_type": "integer"}}}