[Az-Geocaching] Find the center

[Robert & Linda Smith]

I need a little help from some caching experts out there.  I want to 
find the center of 3 sets of coordinates and can not see the forest for 
the trees here.  It should be easy I think.  For instance: Point 1 is 
N34 36.346 W112 29.115,  Point 2 is N34 36.652 W112 27.942, Point 3 is 
N34 36.224 W112 28.532  I am looking for the coordinates at the dead 
center of these 3 points.

Also, does anyone remember if there is a suggestion as to how far apart 
caches need to be??

Thank you in advance, Bob Smith, Team Petite Elite