Golfing Store
The joint probability distribution of variables X and Y is shown in the table below,where X is the number of drivers and Y is the number of putters sold daily in a small golfing store. 
-{Golfing Store Narrative} Calculate the variances of X and Y.
Definitions:
Spinal Cord
A long, thin, tubular bundle of nervous tissue and support cells that extends from the brainstem down the back, central to the body's nervous system.
Brain Stem
The central trunk of the mammalian brain, connecting the brain to the spinal cord and supporting basic life functions.
Limbic System
A complex system of nerves and networks in the brain, involved with instinct and mood control.
Autonomic Nervous System
A part of the peripheral nervous system that controls involuntary bodily functions, including heart rate, digestion, and respiratory rate.
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