East Texas Seasonings is preparing to build one processing centre to serve its four sources of seasonings.The four source locations are at coordinates shown below.Also,the volume from each source is provided.What is the centre of gravity? 
Definitions:
Blind Spot
The area in the human visual field that lacks light-detecting photoreceptor cells, resulting from the optic nerve head's location on the retina.
Bipolar Cells
Cells found in the retina of the eye that act as intermediaries between photoreceptors (rods and cones) and ganglion cells, transmitting visual information.
Optic Nerve
The optic nerve is a paired cranial nerve that transmits visual information from the retina to the brain.
Fully Adjust
Refers to the process of completely adapting or accommodating oneself to new conditions or environments.
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