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_iuNh):
Solve for a: 9*a - 16 = 83 Respond with an integer.

Question 1 (Question id: q_Lo0784M):
Determine the value of a that satisfies: 15 - 4*a = -21 Respond with an integer.

Question 2 (Question id: q_tAKyf9k):
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: "to"

Question 3 (Question id: q_OwRXu4uV):
Find the value of w in the equation: 3 - 6*w = -9 Respond with an integer.

Question 4 (Question id: q_9QFs1LI):
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"



Produce a JSON object whose top-level keys are the question ids.

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 response to a question is a string, add a 'first_char' field containing its first character.
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_iuNh": {"answer": 11}, "q_Lo0784M": {"answer": 9}, "q_tAKyf9k": {"answer": "o", "first_char": "o", "original_string": "to"}, "q_OwRXu4uV": {"answer": 2, "additional_answer_info": {"half_answer": 1, "double_answer": 4}}, "q_9QFs1LI": {"answer": "t", "first_char": "t", "original_string": "it"}}}