The Weekly Demand for a certain commodity has been recorded as follows: Week 1 2 3 4 5 6 7 8 9 Demand 800 1400 1000 1500 1500 1300 1800 1700 1300 Week 10 11 12 13 14 15 16 17 18 Demand 1700 1500 2300 2300 2000 2000 2100 2200 2300   Using a Naïve Method, de

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