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_Lbuf):
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: "not"

Question 1 (Question id: q_2JRcYe4W):
Find the value of h in the equation: 20*h + 15 = 215 Respond with an integer.

Question 2 (Question id: q_aosEYk):
How many times does the letter "n" appear in the text: "or human"? Respond with an integer.

Question 3 (Question id: q_7TcwUjl):
Find the value of e in the equation: 17*e + 63 = 386 Respond with an integer.

Question 4 (Question id: q_hFWGsHc):
Calculate 7 / 1.



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

The value for each key should be an object that contains the answer in the field 'answer'.
For even integer answers, include 'half_answer' equal to 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_aosEYk": {"answer": 1}, "q_Lbuf": {"answer": "t", "first_char": "t"}, "q_2JRcYe4W": {"answer": 10, "half_answer": 5}, "q_7TcwUjl": {"answer": 19}}}