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After plotting demand for four periods, an emergency room manager

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After plotting demand for four periods, an emergency room manager
has concluded that a trend-adjusted exponential smoothing model is appropriate to predict future demand. The initial estimate of trend is based on the net change of 30 for the three periods from 1 to 4, for an average of +10 units.
Period Actual Period Actual
1 210 6 265
2 226 7 279
3 221 8 283
4 240 9 281
5 256 10

Use α=.5 and β=.1, and TAF of 250 for period 5. Obtain forecasts for periods 6 through 10. (Round intermediate calculations and final answers to 2 decimal places.)

t Period TAFt
6 ?
7 ?
8 ?
9 ?
10 ?

 
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