Pathfinder Challenge

Pathfinder Challenge 

 First I create a new file in Illustrator

After That I used the shape tool and made a circle with no fill.

I increased the stroke to 8mm

 I made 2 more circles by copying and pasting, placed them close together so they overlap each other and changed their color.

 After that I selected them all and expanded them and diveded them like so

Finally I used the direction selection tool to select the part where both circles interact and change the color.

 This is what it looks like in the end.