please show all work and math steps.

Discussion Questions 1. What is a qualitative forecasting model, and when is its use appropriate? 2. Identify and briefly describe the two general forecasting approaches. 3. Identify the three forecasting time horizons. State an approximate duration for each. 4. Briefly describe the steps that are used to develop a forecasting system. Problems 4.1-4.42 relate to Time-Series Forecasting 4.1 The following gives the number of pints of type B blood used at Woodlawn Hospital in the past 6 weeks: Week Of Pints Used August 31 360 September 7 389 September 14 410 September 21 381 September 28 368 October 5 374 a. Forecast the demand for the week of October 12 using a 3-week moving average. b. Use a 3-week weighted moving average, with weights of .1,.3, and.6, using .6 for the most recent week. Forecast demand for the week of October 12. c. Compute the forecast for the week of October 12 using exponential smoothing with a forecast for August 31 of 360 and a = 2