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_bUbQyN):
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: "system"

Question 1 (Question id: q_Tmwr):
Calculate 4 * 8.



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

Each key’s value must be an object holding an 'answer' field.
If the response to a question is an integer that is even, also add the field 'half_answer' to the object which contains the answer integer divided by two.
For string answers, include 'first_char' with the answer’s initial letter.

Now provide the result JSON using the described format.

{"ground_truth": {"q_bUbQyN": {"answer": "m", "first_char": "m"}, "q_Tmwr": {"answer": 32, "half_answer": 16}}}