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_yE70):
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_4vwCPGA):
Calculate 0 * -4 + 6.

Question 2 (Question id: q_VYTY):
How many times does the letter "r" appear in the text: "were reduced to"? Respond with an integer.

Question 3 (Question id: q_c5dKzC):
How many times does the letter "o" appear in the text: "power for aërial"? Respond with an integer.



Return a JSON with each question id as a key.

Each key’s value must be an object holding an 'answer' field.
For even integer answers, include 'half_answer' equal to answer ÷ 2.
For string answers, include 'first_char' with the answer’s initial letter.

Beyond the question-id fields, add a 'global_metadata' object with summary information:
• num_questions_asked – total number of questions originally shown.

Now provide the result JSON using the described format.

{"ground_truth": {"q_yE70": {"answer": "d", "first_char": "d"}, "q_4vwCPGA": {"answer": 6, "half_answer": 3}, "q_VYTY": {"answer": 2, "half_answer": 1}, "q_c5dKzC": {"answer": 2, "half_answer": 1}, "global_metadata": {"num_questions_asked": 4}}}