please type the answers, include graphs if necessary. This is the question

Question 1: 10 marks a) Explain why fixed-weighted measures lead to substitution bias. (3 marks) b) Look at the following table. What is the base year? (3 marks) Nomina Nomina Year CPI Income Year CPI Income 1990 41.8 400 2003 107.6 45000 1991 44.4 650 2004 109.6 50000 1992 49.3 800 2005 113.6 55000 1993 53.8 2000 2006 118.3 65000 1994 56.9 5000 2007 124 70000 1995 60.6 9000 2008 130.7 85000 1996 65.2 12000 2009 136.2 90000 1997 72.6 15000 2010 140.3 105000 1998 82.7 19000 2011 144.5 115000 1999 90.9 22000 2012 148.2 125000 2000 96.5 28000 2013 152.4 132000 2001 99.6 32000 2014 156.9 137000 2002 103.9 35000 2015 160.5 150000 c) What is the real income in the year 2012 and 2013? (1 marks) d) What is the percentage change in CPI between years 2012 and 2013? (1 mark) e) What is the percentage change in Nominal Income between years 2012 and 2013? (1 mark) f) What Nominal Income kept up with Inflation? Explain why or why not. (1 marks)