this is a math problem that i need help with. it has to do with Mid point formula....?

Question

here is the question:

hansom city has three high schools. Ruffer high is located at (-4,3), casey high is at (2,-5) and dahi high is at (6,5). Draw the school boundaries so that each student attends the school cloasest to his or her home, as the taxi drives.

this is a worksheet called Heym taxi! so i need help with this problem
teacher please help or any one else

Answer 1

draw all 3 schools on the "map"

For each school, mark intersection that are one block from it with "X1", where X is initial of school.

Then, mark intersections one block away from X1's with X2.

Continue to X3 and so on untill you do not have any unmarked intersections.

Draw the boundaries.