An operation manager wants to compare two forecasting techniques: (1) the weighted moving average and (2) exponential smoothing approaches. Which of following statements is correct in this exponential smoothing is considerably more difficult to implement on a computer. Delphi method can be easily used by exponential smoothing Forecasts can be developed for multiple periods using exponential smoothing while weighted moving average does not have this capability weighted moving average has more emphasis on recent values Less record of past data needs to be kept for exponential smoothing