Forecast Analysis Problem

For the time series below           

Part a) Develop a linear trend forecast          

Part b) Add a quadratic component to the model in part (a) and develop a new forecast        

Part c) Now assume a seasonal pattern and add the seasonality of the months to the linear trend model in part (a) and develop a new forecast     

Part d) Provide the MSE from the 3 models here 

MSE Model a  

MSE Model b 

MSE Model c   

Part e) Based on your answers to part d, for whichever forecast model you deem to be the best, draw a time series graph of both the original time series and the "best" forecast.