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_qdIKq):
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: "is"

Question 1 (Question id: q_IQCS):
Calculate 4 + -8 * -1.

Question 2 (Question id: q_ZSzcCa1):
Calculate ( 0 - -3 ).



Return a JSON with each question id as a key.

The value for each key should be an object that contains the answer in the field 'answer'.
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.
For last-character tasks, provide 'original_string' alongside the answer.

Now provide the result JSON using the described format.

{"ground_truth": {"q_qdIKq": {"answer": "s", "answer_type": "string", "first_char": "s", "original_string": "is"}, "q_IQCS": {"answer": 12, "answer_type": "integer", "additional_answer_info": {"half_answer": 6, "double_answer": 24}}, "q_ZSzcCa1": {"answer": 3, "answer_type": "integer"}}}