(Consumer Price Index) Given the following data, what was the value of the consumer price index in the base year? Calculate the annual rate of consumer price inflation in 2013 in each of the following situations:

a. The CPI equals 200 in 2012 and 240 in 2013. b. The CPI equals 150 in 2012 and 175 in 2013. c. The CPI equals 325 in 2012 and 340 in 2013. d. The CPI equals 325 in 2012 and 315 in 2013