Problem #$4-3$:

The historical demand for the Panasonic Model $304$ Pencil Sharpener is: January, $80$; February, $100$; March, $60$; April, $80$; and May, $90$ units.

a$.$ Using a four$-$month moving average, what is the forecast for June? If June experienced a demand of $100,$ what is the forecast for July?

b$.$ Using single exponential smoothing with $=0\mathrm{.}2,$ if the forecast for January had been $70,$ compute what the exponential forecast would have been for the remaining months through June.

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