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_c2QHriI):
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: "rankings"

Question 1 (Question id: q_9P0XRy):
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: "we"

Question 2 (Question id: q_88PHf):
Determine the value of s that satisfies: 9*s = 90 Respond with an integer.



Return a JSON with each question id (except for q_9P0XRy) as a key.

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.
If the response to a question is an integer that is even, add the field 'additional_answer_info' containing 'half_answer' (answer ÷ 2) and 'double_answer' (answer × 2).
For string answers, include 'first_char' with the answer’s initial letter.

Now provide the result JSON using the described format.

{"ground_truth": {"q_c2QHriI": {"answer": "s", "answer_type": "string", "first_char": "s"}, "q_88PHf": {"answer": 10, "answer_type": "integer", "additional_answer_info": {"half_answer": 5, "double_answer": 20}}}}