JUI TTILIST CECILE alllonly lillCE _ Willietell forecasting LECTliliques for Weekly Weillally U personal computer : an exponential smoothing with a = 0. 25 , and the naive approach . Weekly demand of personal computer Period Actual 33 45 49 55 54 5 10 00 J Q UI D WN` 59 62 65 . Forecast the demands for all possible periods using two methods ( 2.5 marks ) bo . Using MISE error calculations comment on which of the two methods has the greater overall accuracy . ( 2.5 marks ) C. Is it possible to determine whether these forecasting methods are overestimating or underestimating the demand ? Explain ( 2.5 marks ) d . What are the implications of overestimation or underestimation of the demand ?' Discuss . ( 2.5 marks)