Question 1: The table below shows the average earnings index of insurance, banking and finance workers. gives. Year www 1999 2000 2001 2002 2003 2004 March 134 190 310 494 742 1054 June 142 214 350 550 814 1142 September 154 242 394 610 890 1234 December 170 274 442 674 970 1330 a) Plot the given data versus time. b) Make estimates for 2005 and 2006 using the appropriate period (N) of the moving average method. c) Make estimates for 2005 and 2006 for a = 0.8 according to the exponential adjustment method. d) Discuss which method gives the best results based on performance criteria.