1. Three years of first-quarter results are 150, 175, and 200 units, respectively. If the average demand for all quarters is 220 units, what is the first quarter seasonal index? (3)
2. The deseasonalized demand forecast is 500 units for the next year. If the seasonal index for the first quarter is 1.25, what is the forecast for next year's first quarter? (3)
3. Based on below table calculate exponential smoothing for = 0.3 & =0.5 (4)

Actual demand	Forecast
220	300