I have a question about a current homework question. The calculation of ex-ante. Currently I am showing the ex-ante at 5.3%. Can someone please look at the question and help me walk through it.

a)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%.