Following a two-season demand schedule (in-season and off-season) for ski production, use the following table to predict demand for the off-season demand for 2021 using the Holt-Winter model (aka triple exponential smoothing model) with parameters alpha=0.36, beta=0.12 and gamma=0.31. Round to the nearest unit of demand (no decimals) Season Year Demand In 2018 412 Off 2018 51 In 2019 334 Off 2019 120 In 2020 384 Off 2020 139 In 2021 418 Off 2021