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_FCcjky):
Calculate ( -9 * -9 ).

Question 1 (Question id: q_Mfew):
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: "story"

Question 2 (Question id: q_4oty):
Your task is to count how many legs there are in total when given a list of animals.

Now, how many legs are there in total if you have 4 horses, 2 birds, 2 wasps, 1 tiger?
 Respond with an integer.

Question 3 (Question id: q_UNAm):
Find the value of r in the equation: 640*r = 3200 Respond with an integer.



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

Each key’s value must be an object holding an 'answer' field. Additionally, if the task is about counting legs of animals or counting letters in a string, add the task_type field with value 'leg_counting' or 'letter_counting', respectively.
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, also add the field 'half_answer' to the object which contains the answer integer divided by two.
If the question asks for the last character of a string, add an 'original_string' field containing the source string.

Add a top-level 'global_metadata' field that records overall stats:
Include 'num_questions_asked' to record the total number of questions presented.
Add 'num_questions_answered' showing how many questions you answered.

Now provide the result JSON using the described format.

{"ground_truth": {"q_4oty": {"answer": 36, "task_type": "leg_counting", "answer_type": "integer", "half_answer": 18}, "q_FCcjky": {"answer": 81, "answer_type": "integer"}, "q_UNAm": {"answer": 5, "answer_type": "integer"}, "global_metadata": {"num_questions_asked": 4, "num_questions_answered": 3}}}