d) Using the data on one year interest rates (https://research.stlouisfed.org/fred2/data/GS1.txt), calculate the ex-post real rate of interest between May of 1958 and May of 1959. e) Calculate the ex-post real rate of interest from January 2012 to January 2013. f) Calculate the ex-ante real rate of interest from January 2012 to January 2013. To do so, you need data on expected inflation (https://research.stlouisfed.org/fred2/data/MICH.txt). Note that all data on expected inflation is based on expectations for the next 12 months - for example, to make sure we are on same page, verify that the expected rate of inflation from January 2010 to January 2011 was 2.8%