Solve the following problem in class. The quarterly demand for smartphones at a retailer is as shown below. Year 2 Quarter Demand 513 932 1509 1902 693 1163 1857 2469 Forecast the quarterly demand for quarter 1 of year 3 using the following models: 1. 4-week simple moving average. 2. Simple exponential smoothing with a=0. We assume the forecasted value for quarter 1 of year 1 is 510. 3. Which method is more accurate? Justify your answer.