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_xrMNug):
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: "about"

Question 1 (Question id: q_5nDL9GJ7):
Calculate -8 + 8.

Question 2 (Question id: q_u74AZA):
Calculate -6 * -4.



Your output must be a JSON mapping every question id to its answer info.

The value for each key should be an object that contains the answer in the field 'answer'.
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).

Now provide the result JSON using the described format.

{"ground_truth": {"q_xrMNug": {"answer": "t"}, "q_5nDL9GJ7": {"answer": 0, "additional_answer_info": {"half_answer": 0, "double_answer": 0}}, "q_u74AZA": {"answer": 24, "additional_answer_info": {"half_answer": 12, "double_answer": 48}}}}