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_QOEQ6):
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: "and"

Question 1 (Question id: q_0Qyp):
How many times does the letter "u" appear in the text: "not uniform and"? Respond with an integer.

Question 2 (Question id: q_BtRLb):
How many times does the letter "o" appear in the text: "for all"? Respond with an integer.

Question 3 (Question id: q_yKWQ3Hmh):
Calculate -6 / 2 + 7.

Question 4 (Question id: q_CIS0igu5):
Calculate 4 + 8.



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 response to a question is a string, add a 'first_char' field containing its first character.

Now provide the result JSON using the described format.

{"ground_truth": {"q_QOEQ6": {"answer": "d", "first_char": "d"}, "q_0Qyp": {"answer": 1}, "q_BtRLb": {"answer": 1}, "q_yKWQ3Hmh": {"answer": 4, "additional_answer_info": {"half_answer": 2, "double_answer": 8}}, "q_CIS0igu5": {"answer": 12, "additional_answer_info": {"half_answer": 6, "double_answer": 24}}}}