Great Lakes Blood Bank (fictional) is the primary supplier of blood to various hospitals in Erie County, Pennsylvania. The number of pints of the rare blood type AB- supplied by the blood bank to the hospitals in Erie County during the past 8 weeks are given in the following table:

1. Forecast the demand for the AB- blood type for week 9 using a four-period moving average.

2. Forecast the demand for the AB- blood type for week 9 using a four-period weighted moving average, with weights of W₁ = 0.4, W₂ = 0.3, W₃ = 0.2, and W₄ = 0.1. Note the higher weights are assigned to the most recent weeks.

3. Compute the forecast for week 9 using simple exponential smoothing. Assume F₁ = 270 and α = 0.3.

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4 8. Week Pints Supplied 270 344 350 370 352 325 295 367