Question 3 (30%) Flash Fashion Company sells jackets. The sales record of jackets in the most recent five time periods is shown in the following. It is also known that the forecast for Period 2 is 48,000 jackets. Period 5 Sales (units) 1 2 3 4 45,000 50,000 52,000 56,000 58,000 (a) Predict the forecast for Period 6 using exponential smoothing method with a smoothing coefficient 0.2. (10%) (b) Discuss the impact of using a larger smoothing coefficient, say 0.5, instead of the smoothing coefficient of 0.2 used in part (a), on the forecast? Explain your answer explicitly. No calculation is required. (10%) (c) State two situations that the exponential smoothing method is not preferred for forecasting with clear explanation. (10%)