Question 17 (3 points) Suppose that an operations manager is trying to determine what forecasting method to use for the following forecasting problem. Based on the following historical data, calculate the following forecasts and specify which forecasting method you would utilize. Actual Month Demand 1 63 2 65 3 68 4 70 5 73 6 75 We can calculate the weighted 3-month forecasts using weights of 0.6, 0.3, and 0.1 for periods 4-6. In particular, the forecast for period 6 is O 66 68.9 71.6 71.4 Question 18 (4 points) Refer to the information in Q17. We can calculate the double exponential smoothing forecasts for periods 2-6 using an initial trend forecast (T1) of 1.8, and initial exponential smoothing forecast (51) of 60, an a of 0.30 and a B of 0.30. In particular, the forecast for period 3 is 64.8480 68.1653 71.2525 74.4708 Question 19 (3 points) Refer to your calculations in Q17 and Q18. Calculate the Mean Absolute Deviation (MAD) over periods 5 and 6 by the above each technique. Which forecasting method is better in terms of MAD performance measure? weighted 3-month method double exponential smoothing method