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_mNwUng):
Determine the value of y that satisfies: 90*y - 270 = 1530 Respond with an integer.

Question 1 (Question id: q_qVj7):
How many times does the letter "s" appear in the text: "With this"? Respond with an integer.

Question 2 (Question id: q_sjCcgnN):
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: "can"

Question 3 (Question id: q_awdpce):
Determine the value of a that satisfies: 8*a + 25 = 105 Respond with an integer.

Question 4 (Question id: q_xf3FDkE8):
Calculate ( -2 / 1 + 7 ).



Create a JSON object keyed by every question id except q_awdpce.

Each key’s value must be an object holding an 'answer' field.
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.
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_qVj7": {"answer": 1}, "q_xf3FDkE8": {"answer": 5}, "q_mNwUng": {"answer": 20, "half_answer": 10}, "q_sjCcgnN": {"answer": "n", "first_char": "n"}}}