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_MP2Lz):
Solve for r: 4*r - 9 = 19 Respond with an integer.

Question 1 (Question id: q_kq2V4D):
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: "very"



Return a JSON with each question id as a key.

Each key’s value must be an object holding an 'answer' field.
For even integer answers, include 'half_answer' equal to answer ÷ 2.
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_MP2Lz": {"answer": 7}, "q_kq2V4D": {"answer": "y", "first_char": "y"}}}