PLEASE SHOW ALL STEPS. SHOW ALL WORK AND EXPLAIN YOUR ANSWER. PLEASE DO EVERY STEP. WRITE WITH BLACK PEN AND PAPER ONLY - NO TYPING. PLEASE WRITE VERY NEATLY - NO CURSIVE AT ALL. FOLLOW ALL INSTRUCTIONS The manager of a small health clinic would like to use a time series model to forecast demand for laboratory services in the facility. However, she is not sure which model to use. To make her decision, she would like to compare the forecast accuracies of several methods only over the last four periods, i.e. weeks 3, 4, 5, and 6. She is considering the following methods: (a) 2-week simple moving average; (b) 2-week weighted moving average (with a weight of 3 for the most recent period and a weight of 1 for the period before that); (c) Simple exponential smoothing (with alpha=0.2); and, (d) Exponential smoothing with trend adjustment (with alpha=0.2 and beta=0.4). Week Demand (lab requirements) 1 330 2 350 3 320 4 370 5 368 6 343 Given the above historical data, which model do you think would be better to use based on MAD? For the most accurate model, what are the tracking signals over the last four periods? (Note: For each method, you need to show your forecast calculations for one period; you can just write the final numbers for the remaining periods. Round your answers to two decimal digits. Please use the