HeathCo is a manufacturing company that produces a line of skiwear that is sold under various brand names. The Product Manager of HeathCo has contracted with you to develop a model to forecast company sales. You will be supplied with quarterly sales data from 2007 through 2016. They want a model that will allow them to forecast sales one year (four quarters) out. Develop and interpret models using the methods below. Use the data from the years 2007 to 2015 to develop models. Evaluate the fit of your models to the data series used to create the model. Reserve 2016 data as a holdout to evaluate the accuracy of your models