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_8G58pH):
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: "world"

Question 1 (Question id: q_48TG25WJ):
Determine the value of k that satisfies: 30*k + 45 = 165 Respond with an integer.

Question 2 (Question id: q_yUZudwz):
Calculate -3 / 3 + 3.

Question 3 (Question id: q_NFZUAk):
Calculate 4 * 7.

Question 4 (Question id: q_d6PH):
How many times does the letter "n" appear in the text: "electricity was known"? Respond with an integer.

Question 5 (Question id: q_i3yg):
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: "and"



Output JSON where all question ids are keys, omitting q_i3yg, q_d6PH.

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.
For even integer answers, include 'half_answer' equal to answer ÷ 2.

Now provide the result JSON using the described format.

{"ground_truth": {"q_yUZudwz": {"answer": 2, "answer_type": "integer", "half_answer": 1}, "q_8G58pH": {"answer": "d", "answer_type": "string"}, "q_48TG25WJ": {"answer": 4, "answer_type": "integer", "half_answer": 2}, "q_NFZUAk": {"answer": 28, "answer_type": "integer", "half_answer": 14}}}