You have the following data for the last 12 month sales for the PQR Corporation (1000's $)
Jan 500
Feb 520
Mar 520
apr 510
may 580
june 610
aug 620
sep 580
oct 550
nov 510
dec 480
a. Calculate a 3month centered moving average
b. use this moving average to forecast sales for Januarey of next year
c. if you were asked to forecast jand and feb sales for next year, would youb be confident of your forecast using the preceding moving averages,? Why