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_8W6gEQS):
Calculate ( 1 - -3 ).

Question 1 (Question id: q_ClpGN4b):
Determine the value of a that satisfies: 26*a = 494 Respond with an integer.

Question 2 (Question id: q_6oR2):
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: "is"



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.
Include an 'answer_type' field (value 'string' or 'integer') for every answer object.
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.
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_8W6gEQS": {"answer": 4, "answer_type": "integer", "half_answer": 2}, "q_ClpGN4b": {"answer": 19, "answer_type": "integer"}, "q_6oR2": {"answer": "s", "answer_type": "string", "first_char": "s"}}}