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_FnacbWyA):
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: "explain"

Question 1 (Question id: q_UcxbFEM):
Calculate 5 - 1 * 0.

Question 2 (Question id: q_1uBusjS):
How many times does the letter "a" appear in the text: "a veritable"? Respond with an integer.

Question 3 (Question id: q_BRz5qyA):
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: "athletes"

Question 4 (Question id: q_tBM0ULZ):
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: "each"



Output JSON where all question ids are keys, omitting q_BRz5qyA.

For every question id, supply an object whose 'answer' field stores the solution.
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).

Beyond the question-id fields, add a 'global_metadata' object with summary information:
Include 'num_questions_asked' to record the total number of questions presented.

Now provide the result JSON using the described format.

{"ground_truth": {"q_FnacbWyA": {"answer": "n"}, "q_UcxbFEM": {"answer": 5}, "q_1uBusjS": {"answer": 2, "additional_answer_info": {"half_answer": 1, "double_answer": 4}}, "q_tBM0ULZ": {"answer": "h"}, "global_metadata": {"num_questions_asked": 5}}}