Vacation destinations often run on a seasonal basis, depending on the primary activities in that location. Amanda Wang is the owner of a travel agency in Cincinnati, Ohio. She has built a database of the number of vacation packages (Vacation) that she has sold over the last twelve years. The following table contains a portion of quarterly data on the number of vacation packages sold.

Year Quarter Vacation 2008 1 560 2008 2 207 2008 3 1374 2008 4 733 2009 1 1044 2009 2 644 2009 3 1509 2009 4 1185 2010 1 269 2010 2 518 2010 3 1417 2010 4 604 2011 1 543 2011 2 340 2011 3 1452 2011 4 840 2012 1 400 2012 2 1063 2012 3 1752 2012 4 843 2013 1 841 2013 2 469 2013 3 1717 2013 4 852 2014 1 731 2014 2 829 2014 3 1128 2014 4 580 2015 1 676 2015 2 835 2015 3 1275 2015 4 574 2016 1 292 2016 2 552 2016 3 1641 2016 4 1088 2017 1 611 2017 2 929 2017 3 1174 2017 4 536 2018 1 465 2018 2 472 2018 3 1181 2018 4 614 2019 1 726 2019 2 789 2019 3 1343 2019 4 983

b. Use the preferred model to forecast the quarterly number of vacation packages sold in the first two quarters of 2020. (Round coefficient estimates to at least 4 decimal places and final answers to 2 decimal places.)

Date Forecast

Quarter 1 =

Quarter 2. =