The owner of the Chocolate Outlet Store wants to forecast chocolate demand. Demand for the preceding four years is shown in the following table:

Year	Demand (Pounds)
1	68,800
2	71,000
3	75,500
4	71,200

Forecast demand for Year 5 using the following approaches: 

(a) Three-year moving average; 

(b) A three-year weighted moving average using .40 for Year 4, .20 for Year 3, and .40 for Year 2; 

(c) Exponential smoothing with α = .30, and assuming the forecast for Year 1 = 68,000.