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_P0mIOHtz):
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: "it"

Question 1 (Question id: q_Do8cu1):
Determine the value of a that satisfies: 15 - 4*a = -21 Respond with an integer.

Question 2 (Question id: q_ukkCzHeX):
How many times does the letter "a" appear in the text: "an eBook"? Respond with an integer.

Question 3 (Question id: q_Q0dx9):
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 ants, 1 beetle, 4 shrimps, 4 leechs, 4 lions?
 Respond with an integer.

Question 4 (Question id: q_rVnN):
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 2 spiders, 4 ants, 4 crickets, 3 cats?
 Respond with an integer.



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).
If the question asks for the last character of a string, add an 'original_string' field containing the source string.

Now provide the result JSON using the described format.

{"ground_truth": {"q_P0mIOHtz": {"answer": "t", "original_string": "it"}, "q_Do8cu1": {"answer": 9}, "q_ukkCzHeX": {"answer": 1}, "q_Q0dx9": {"answer": 86, "additional_answer_info": {"half_answer": 43, "double_answer": 172}}, "q_rVnN": {"answer": 76, "additional_answer_info": {"half_answer": 38, "double_answer": 152}}}}