Problem 3-10 points 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 19 for the three periods from 1 to 4, for an average of +6.33 units. eBook Print Period Actual Period Actual 209 6 258 228 7 273 3 223 8 283 228 9288 5 248 10 References Use a=.60 and B=15, and TAF of 240 for period 5. Obtain forecasts for periods 6 through 10. (Round your intermediate calculations and final answers to 2 decimal places.) t Period TAF+