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:
Secure and Private Network
A Secure and Private Network refers to a network designed to protect and encrypt data being sent over it, ensuring that the information remains confidential and inaccessible to unauthorized users.
Network
A group of two or more computers (or nodes) that are configured to share information and resources such as printers, files, and databases.
Share Information
The act of making data, knowledge, or insights available to others through various means of communication.
Configured
Set up or arranged with specified settings or parameters to perform a particular task or function.
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