Yazici Batteries, Inc.'s monthly sales were as follows:

MES	SALES
January	20
February	21
March	15
April	14
Can	13
June	sixteen
Julio	17
August	18
September	20
October	20
November	21
December	23

Top of the form

a) Graph 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 highest weights applied to the most recent months.

iv)Exponential smoothing using α = .3 and a September 18 forecast.

v) A trend projection.

c) With the given data, what method would allow you to forecast sales for next March?