This is the answer. I did the math. You need to put them in order from smallest to biggest left to right. then q2 is the middle term, q1 is the middle term of the first half, and q3 is the middle term of the second half.
The answer is on the second pic, and you should save the first pic to help you in the future.
The box plot for the set of data <span>43, 48, 52, 61, 74, 81, 40, 42, 56, 77, 81, 43 </span>will be found by rewriting the data in ascending data, then plotting it. This will give us the box plot in the attached figure.