this is Engineering management Course from Industrial Eng

Pls answer them all

1. Sales of a particular product for the years 2009 through 2012 have been 48, 64, 67, and 83, respectively. a. What sales would you predict for 2013 using a simple four-year moving average? b. What sales would you predict for 2013 using a weighted moving average with weights of 0.5 for the immediate preceding year and 0.3, 0.15 and 0.05 for the three years before that? 2. Using exponential smoothing with a weight of 0.6 on actual values: a. if sales are $45,000 and $50,000 for 2010 and 2011, what would you forecast for 2012? b. given this forecast and actual 2012 sales of $53,000, what would you then forecast for 2013? 3. In Question 2, taking actual 2009 sales of $48,000 as the forecast for 2010, what sales would you forecast for 2011, 2012 and 2013 using exponential smoothing and a weigh a based on actual values of (a) 0.4; (b) 0.8