PROBLEM 2. Demand for aqua fit classes at a large Community Centre are as follows for the first six weeks of this year. Week | Demand 1 162 2 158 3 138 4 190 182 6 177 7 von WN Requirement: 1. Forecast for weeks 3 through week 7 using a two-period simple moving average; 2. Forecast for weeks 4 through week 7 using a three-period weighted moving average with weights of 6,3 and 1 3. Forecast for weeks 4 through week 7 using exponential smoothing. Begin with a week 3 forecast of 130 and use an alpha of 3 PROBLEM 3. Sales of a new shed has grown steadily from the large farm supply store. Below are the sales from the past five years. Forecast the sales for 2018 and 2019 using exponential smoothing with an alpha of .4. In 2015, the forecast was 360. Calculate a forecast for 2016 through to 2020. TI Year 2015 2016 2017 2018 2019 2020 Sales Forecast 348 372 311 371 365 PROBLEM 4. Below is the actual demand for X-rays at a medical clinic. Two methods of forecasting were used. Calculate a mean absolute deviation for each forecast method. Which one is more accurate? Week 1 2 3 4 Actual Demand 48 65 58 79 Forecast No. 1 50 55 60 70 Forecast No. 2 50 56 55 85