A county wants to build one centrally-located processing facility to serve the county's four recycling drop-off locations.The four drop-offs have characteristics as given in the table below.What is the approximate center of gravity of these four locations? 
Definitions:
Immune Function
The activities performed by the immune system to protect the body against disease-causing organisms and substances.
Antigens
Substances that the immune system recognizes as foreign or dangerous, eliciting an immune response, often found on pathogens or produced by them.
Leukocytes
White blood cells, part of the immune system, involved in protecting the body against both infectious disease and foreign invaders.
Neutrophils
A type of white blood cell that plays a pivotal role in defending the body against infection by ingesting bacteria and fungi.
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