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_jfhz5t):
Solve for f: 9*f + 2 = 146 Respond with an integer.

Question 1 (Question id: q_eqTiP8Bk):
Calculate ( 2 + 9 ).

Question 2 (Question id: q_ZleT8p):
Calculate -3 * -7.



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.
Include an 'answer_type' field (value 'string' or 'integer') for every answer object.
For even integer answers, include 'half_answer' equal to answer ÷ 2.
If the question asks for the last character of a string, add an 'original_string' field containing the source string.

Now provide the result JSON using the described format.

{"ground_truth": {"q_jfhz5t": {"answer": 16, "answer_type": "integer", "half_answer": 8}, "q_eqTiP8Bk": {"answer": 11, "answer_type": "integer"}, "q_ZleT8p": {"answer": 21, "answer_type": "integer"}}}