PROBLEM-1) (100 Pts.) ABC, an airplane spare parts manufacturer, was founded in 2008 and has sold the following numbers of spare parts: YEAR SALES 2012 2013 2014 2015 655 720 660 2008 2009 2010 2011 375 580 595 430 215 YEAR SALES 650 2022 2023 920 1100 2016 2017 2018 2019 2020 2021 895 770 785 720 635 a. Suppose the firm uses "Holt's method" for forecasting sales. Find So and Go by using regression method through 2008-2015. Using a = 0.1 and = 0.2 find one-step-ahead forecasts of spare parts for 2016 through 2024. (40 Pts) b. Compute the MAD and MSE for the forecasts during this period (2016-2023). (20 Pts.) 020" made at the end of 2022? (40 Pts.)

solve by hand

PROBLEM-1) (100 Pts.) ABC, an airplane spare parts manufacturer, was founded in 2005 and has