A particular forecasting model was used to forecast a six$-$month period. Here are the forecasts and actual demands that resulted:

a$.$ Find the tracking signal for each month. $($Negative values should be indicated by a minus sign. Round your answers to the

nearest whole number.$)$

b$.$ Does the model used here give acceptable answers?

No$,$ the model's performance is poor.

Yes, the model's performance is good.