You are given the following information on the quarterly profits for Ajax Corporation. 
a.Find the four-quarter centered moving averages.
b.Compute the seasonal-irregular component.
c.Compute the seasonal factors for all four quarters.
d.Represent the deseasonalized series.
Definitions:
Central Nervous System
The part of the nervous system consisting primarily of the brain and spinal cord, responsible for processing and sending out nerve signals.
Peripheral Nervous System
The part of the nervous system that lies outside the central nervous system, consisting of nerves and ganglia, responsible for relaying information between the body and brain.
Sympathetic Division
Part of the autonomic nervous system that prepares the body for quick action in emergencies; "fight or flight" response.
Parasympathetic Division
Part of the autonomic nervous system responsible for conserving energy and bringing the body to a state of rest by slowing the heart rate, increasing intestinal and glandular activity, and relaxing sphincter muscles.
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