Compute a three-period moving average forecast given demand for shopping carts for the last five periods. Period 1 2 3 4 LO 5 Demand 42 40 45 40 41 43 the 3 most recent demands Data is provided below, calculate the forecast for the period 5, 6....., using a four-period simple moving average. PERIOD forecast for period 5= F5 1 2 3 4 5 6 7 8 9 10 11 12 ACTUAL DEMAND 1,600 2,200 2,000 1,600 2,500 3,500 3,300 3,200 3,900 4,700 4,300 4,400