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_xVpq):
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: "at"

Question 1 (Question id: q_QbYi8c4n):
How many times does the letter "s" appear in the text: "sun and to"? Respond with an integer.

Question 2 (Question id: q_T6pggX2):
How many times does the letter "a" appear in the text: "present Yes answers"? Respond with an integer.

Question 3 (Question id: q_nmr5L1):
Find the value of b in the equation: 18*b - 21 = 105 Respond with an integer.

Question 4 (Question id: q_XlrKzX):
Your task is to count how many legs there are in total when given a list of animals.

Now, how many legs are there in total if you have 1 horse, 3 birds, 4 fireflys, 1 jellyfish, 3 deers?
 Respond with an integer.



Return a JSON with each question id as a key.

Each key’s value must be an object holding an 'answer' field.
If the response to a question is an integer that is even, add the field 'additional_answer_info' containing 'half_answer' (answer ÷ 2) and 'double_answer' (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_xVpq": {"answer": "t", "first_char": "t"}, "q_QbYi8c4n": {"answer": 1}, "q_T6pggX2": {"answer": 1}, "q_nmr5L1": {"answer": 7}, "q_XlrKzX": {"answer": 46, "additional_answer_info": {"half_answer": 23, "double_answer": 92}}}}