The answer is -17 i think
I is a good friend and a good uuuuuuyyuyhyyytfikh..
The median is 26 because if you put the numbers in order it’s 18,21,21,24,26,35,39,48 and the list of numbers is even so you can take out one of the 21 and the you get only 7 sets of numbers and the middle number is 26
