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The demand forecast for the first quarter in Year $4$ is

units.

$($Round to one decimal place as needed.$)$

The demand forecast for the second quarter in Year $4$ is units.

$($Round to one decimal place as needed.$)$

The demand forecast for the third quarter in Year $4$ is units.

$($Round to one decimal place as needed.$)$

The demand forecast for the fourth quarter in Year $4$ is units.

$($Round to one decimal place as needed.$)$

b$.$ Interpret the meaning of the coefficients for the seasonal dummy variables. Select the correct choice below and fill in the answer boxes to complete your choice.

$($Round to one decimal place as needed.$)$

A$.$ Quarter $2$ has an average demand that is

B$.$ Quarter $2$ has an average demand that is

C$.$ Quarter $1$ has an average demand that is

units below that for Quarter $4.$ Quarter $2$ has an average demand that is

units below that for Quarter $1.$ Quarter $4$ has an average demand that is

units above that for Quarter $2.$ Quarter $4$ has an average demand that is

units below that for Quarter $4.$ Quarter $3$ has an average demand that is

units below that for Quarter $1.$

units above that for Quarter $3.$

units below that for Quarter $4.$

c$.$ Calculate the MAD for this forecast.

MAD $=($Round to two decimal places as needed.$)$

Time Series Data Table