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:
NPV
Net Present Value; a financial metric used to evaluate the profitability of an investment, calculated by subtracting the present value of cash outflows from the present value of cash inflows over a period of time.
IRR
Stands for Internal Rate of Return, a financial metric used to evaluate the profitability of potential investments.
Capital Budgeting
The process of evaluating and selecting long-term investments that are consistent with the firm's goal of maximizing owner wealth.
Incremental
Pertaining to a small or marginal change, often in cost or quantity, that results from a variation in operations or production level.
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