Browse StatsSA website (Wstatssagovza). scroll to the bottom of the Home page. under TOOLS submenu. choose rrTime Series Data\". Select the excel file download. select Publication No: P2041 (l'vlining Production and sales). Open the file rrExcel table 20220T.zip\" in the archived file. Extract the data MVSZDDDD (Mineral sales according to mining divisions. mineral groups and minerals (Total. gold included. seasonally adjusted value {Million)) from August 2012 to July 2022. Corrected data extracted. {10 marks) Answer the following questions. (a) Plot the time series. ACF and PAOF and comment on the series' stationarity. (10 marks) (b) Would you recommend any transformationts) to stationarise the series? Justify your answer. (1+4 marks) to) Fit appropriate ARIMA modelts) to the series. {20 marks) (d) Choose the best model and justify your choice. (5+5 marks) (e) Write down the mathematical equation of the signicant model chosen in (d). (5 marks) (f) Use the chosen model in (d) to forecast the next twelve values for this series. (10 marks)