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$12.$

$\backslash$table$[[$Time Period,Actual Series,Forecast Series,Forecast Error$],[1,100,100,0],[2,110,--,--],[3,115,--,--]]$

If a smoothing constant of $\mathrm{.}3$ is used, what is the exponentially smoothed forecast for period $3$:

a$.103.$

b$.106\mathrm{.}6$

c$.112\mathrm{.}6$

d$.104\mathrm{.}4$

e$.115\mathrm{.}0$

$13.$ The ACF for the Gap sales is shown above. There is clear evidence in the ACF that

a$.$ The data is stationary

b$.$ Gap sales have fallen int the last $12$ periods

c$.$ There is a strong trend in data

d$.$ The data is too strongly correlated to identify trend

e$.$ There is not seasonality in the data.