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_BPygifA):
Calculate 9 - -9.

Question 1 (Question id: q_9J9gWX4):
Calculate ( ( -1 - -9 ) + -2 ).

Question 2 (Question id: q_89KpYcJ):
Calculate ( ( 9 - 1 ) ).

Question 3 (Question id: q_DfkGxH):
Your job is to return the last character of a string as a string. For example, the last char of "hello" is "o". Return the last character of the following string: "and"

Question 4 (Question id: q_iTsn1Zi):
Calculate -4 + 7.



Create a JSON object keyed by every question id except q_iTsn1Zi.

Each key’s value must be an object holding an 'answer' field.
Include an 'answer_type' field (value 'string' or 'integer') for every answer object.
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_BPygifA": {"answer": 18, "answer_type": "integer", "additional_answer_info": {"half_answer": 9, "double_answer": 36}}, "q_9J9gWX4": {"answer": 6, "answer_type": "integer", "additional_answer_info": {"half_answer": 3, "double_answer": 12}}, "q_89KpYcJ": {"answer": 8, "answer_type": "integer", "additional_answer_info": {"half_answer": 4, "double_answer": 16}}, "q_DfkGxH": {"answer": "d", "answer_type": "string", "first_char": "d"}}}