The number of properties newly listed with a real estate agency in each quarter over the last four years is given below.Assume the time series has seasonality without trend. 
a.Develop the optimization model that finds the estimated regression equation that minimizes the sum of squared error.
b.Solve for the estimated regression equation.
c.Forecast the four quarters of Year 5.
Definitions:
Whole Population
Refers to the entire number of individuals or entities that make up a specific group or area being studied.
Internal Colonialism
A concept in sociology referring to the unequal economic and power relations within a country, often between a dominant group and marginalized communities.
Expulsion
The act of forcing someone to leave a place, especially an educational institution or a country, often as a form of punishment.
Conquest
The act of gaining control over a territory or people, typically through military force.
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