please be clear , Especially the third question

Q1. Q2. Sales of a particular product for the years 2018 through 2021 have been 48,000, 64,000, 67,000, and 83,000, respectively. (a) What sales would you predict for 2022 using a simple four-year moving average? (b) What sales would you predict for 2022 using a weighted moving average with weights of 0.50 for the immediate preceding year and 0.3, 0.15, and 0.05 for the three years before that? Using exponential smoothing with a weight a of 0.6 on actual values: (a) If sales are $45,000 and $50,000 for 2019 and 2020, what would you forecast for 2021? (The first forecast is equal to the actual value of the preceding year.) (b) Given this forecast and actual 2021 sales of $53,000, what would you then forecast for 2022? In Qi, what sales would you forecast for 2022 using the simple regression? Q3