Canada has had relatively low inflation rates since the 1990s. The CPI was at 115.1, 117.8, 120.7, 121.3, 123.1, and 124.3 at the beginning of 2010, 2011, 2012, 2013, 2014, and 2015, respectively. These numbers are quoted in terms of a base value of 100 in 2002.

a. What amount was required at the beginning of 2015 in order to have the same purchasing power as $100 five years earlier, at the beginning of 2010?

b. What were the inflation rates for each of the years 2010 to 2014 inclusive?