B is the answer.
You want to put your numbers in order for example: 12,23,32,39,45,65,76,87
So the 2 numbers in the middle is 39 and 45. You add those together and get 84. Divide 84 by 2 since those were the two numbers in the middle and you would get 42 as the median.
Median is 42.
Then your minimum numer is 12. Maximum number is 87.
First Q is 27.5 and third q is 70.5.
There you go!