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:
Month-to-Month Tenancy
A type of rental agreement that does not have a set end date but continues on a monthly basis until either party decides to terminate it.
Tenancy at Will
A rental agreement allowing a tenant to occupy property for an indefinite period, terminable by either landlord or tenant at any time.
Tenancy at Sufferance
A situation where a tenant remains in the property without the landlord's consent after the lease period has ended.
Long-Term Leases
Lease agreements that extend for a substantial period of time, often more than one year, used frequently in real estate and equipment leasing.
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