1)The Silverchems Company is trying to choose the most appropriate forecast technique to use for planning ahead in the coming years. Their historical data for the sales of the last 6 months is presented in the table below. Calculate the forecasts by using;

a.Simple average method,

b.Weighted moving average method for 2 periods, with weights 0.8 and 0.2,

c.Exponential smoothing method with = 0.4.