It is 86.5 points. Take all the numbers and then put them in smallest to greatest. Then cross out the numbers int'l you get to the middle. But since there is 86 and 87 then you find the middle between those numbers and then you get your answer
where we pick the solution for this system such that . Then we find
Note that you can always find a solution to the system above that satisfies as long as . What this means is that you can always find the value of as a (constant) function of .