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_4ampV):
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_alYEL):
Calculate -6 - ( ( -3 + -4 ) ).

Question 2 (Question id: q_StfW6):
Calculate -4 - -8 * 3.

Question 3 (Question id: q_loWi):
How many times does the letter "m" appear in the text: "our modern towns"? Respond with an integer.



Your output must be a JSON mapping every question id to its answer info.

For every question id, supply an object whose 'answer' field stores the solution.
For even integer answers, include 'half_answer' equal to answer ÷ 2.
For string answers, include 'first_char' with the answer’s initial letter.
For last-character tasks, provide 'original_string' alongside the answer.

Now provide the result JSON using the described format.

{"ground_truth": {"q_4ampV": {"answer": "d", "first_char": "d", "original_string": "and"}, "q_alYEL": {"answer": 1}, "q_StfW6": {"answer": 20, "half_answer": 10}, "q_loWi": {"answer": 1}}}