The monthly sales for Yazici Batteries, Inc., were as follows:

a) Plot the monthly sales data.b) Forecast January sales using each of the following:i) Naive method.ii) A 3-month moving average.iii) A 6-month weighted average using .1, .1, .1, .2, .2, and .3, with the heaviest weights applied to the most recent months.iv) Exponential smoothing using an = .3 and a September forecast of 18.v) A trend projection.c) With the data given, which method would allow you to forecast next March’s sales?

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MONTH January February March April May June July August September October November December SALES 20 21 15 14 13 16 17 18 20 20 21 23