I would like some assistance with following Linnear Programming and Quantitative Analysis

(b) MONTH ACTUAL SALE Jan 15 Feb 16 Mar 14 Apr 18 May 21 Jun 20 Jul 19 Aug 22 Sep 24 (a) Use the three-month moving average to forecast the demand from April to September in the table above. [2 marks] (b) Use the three-month weighted moving average to forecast the demand from April to September in the table above using weights 0.23, 0.35, 0.42. [2 marks] (c) Given an alpha (a) value of 0.35, use the exponential smoothing method of forecasting to predict the demand from February to September in the table above. [4 marks] (d) Use the Mean Absolute Deviation (MAD) and the Mean Absolute Percent Error (MAPE) to compare the two methods, and state which is the most efficient one to use. [3 marks]