Refer to Solved Problem 4.1 on page 144. Using smoothing constants of 6 and .9, develop forecasts for the sales of VW Beetles. What effect did the smoothing constant have on the forecast? Use MAD to determine which of the three smooth- ing constants (-3, 6, or.9) gives the most accurate forecast. PX 4.19 Income at the architectural firm Spraggins and Yunes for the period February to July was as follows: FEBRUARY ARIL JU MONTH Income (in $ thousand) Use trend-adjusted exponential smoothing to forecast the firm's August income. Assume that the initial forecast average for February is $65.000 and the initial trend adjustment is 0. The smoothing constants selected are er I and B = .2. Pa Problema 41-442 relate to Time-Series Forecasting The following gives the number of pints of type B blood used at Woodlawn Hospital in the past 6 wecks. WEEK OF PINTS USED August 31 360 September 7 389 September 14 410 September 21 September 28 368 October b) Use a 3-week weighted moving average with weights of 123, 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 2PX 4.2 YEAR 4 5 5 2 g 9 8 DEMAND 1 7 12 5 9 11 * Forecast the demand for the week of October 12 using a) Plot the above data on a graph. Do you observe any trend. cycles, or random variations! bi Starting in your and going to year 2. forecast demand using a 3-year moving average. Plot your forecast on the same graph as the original data