Fill in Column (4) by calculating real GDP using the GDP deflator with a base year of 2016 from Column (3). Fill in Column (7) by calculating real GDP using the GDP deflator with a base year of 2018 from Column (6). (Enter your responses rounded to the nearest whole number.) Fill in Column (5) by calculating the annual percentage change in real GDP for each year using the values from Column (4). Fill in Column (8) by calculating the annual percentage change in real GDP for each year using the values from Column (6). (Enter your responses rounded to two decimal places and include a minus sign if necessary.)