IBM produces hard drives for major computer/laptop manufacturers. The market has been decreasing over the past three years due to the solid-state drives. Using the past three years of data, IBM would like to forecast the sales for the next fiscal year for each quarter to determine whether it needs to decrease the production capacity for traditional hard drives. Derive the forecast by computing trend on deseasonalized data. Quarter 1 2 3 4 Sales 2017 4800 3400 4200 3200 Sales 2018 3600 2600 3500 2300 Sales 2019 3300 2200 2900 2000