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_XwE2clGm):
Solve for k: 15*k + 2 = 137 Respond with an integer.

Question 1 (Question id: q_hBUi):
How many times does the letter "e" appear in the text: "motive power"? Respond with an integer.

Question 2 (Question id: q_COI8):
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: "their"



Output JSON where all question ids are keys, omitting q_COI8.

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.
For string answers, include 'first_char' with the answer’s initial letter.
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_hBUi": {"answer": 2, "answer_type": "integer", "half_answer": 1}, "q_XwE2clGm": {"answer": 9, "answer_type": "integer"}}}