1. The UTC petrol station manager has collected the following data on unleaded petrol sales for the past 10 months:

Month	Gasoline demand (gallons)
October	900
November	810
December	850
January	910
February	860
March	920
April	890
May	810
June	780
July	850

a) Estimate gasoline demand from January to August using the three-month moving average.

b) Estimate gasoline demand from October to August using the exponential smoothing method ( = 0.10).

c) Compare your estimates in (a) and (b) with MAPE. Which method yields more accurate estimates?