Wilkins competes in a highly seasonal commodity market with the peak demand occurring in the third quarter. The figure below demonstrates sales of PVB in the first quarter of 2001 to fourth quarter of 2004 . Which of the following is the best technique to forecast demand for PVB? A linear time trend in the secular trend model Declining rate of growth trends in the secular trend model Using dummy variables to capture seasonal variations Constant rate of growth trends in the secular trend model.