Use the table to answer the following questions (note: the second column is measuring real GDP, and the figure at the top of that column is 1075)
| Year |
billions of dollars in constant prices |
| 2012 |
1075 |
| 2013 |
1120 |
| 2014 |
1160 |
| 2015 |
1175 |
| 2016 |
1200 |
a. Calculate the economic growth rate for each year from 2012 to 2016.
b. Calculate the average annual economic growth rate for the period 2012 to 2016.