Use the table to answer the questions below.

The table below shows government purchases (G), net tax revenues (T), and debt- service payments (iD) over four years for a hypothetical economy. The government's budget deficit can be expressed as AD = (G + iD) - T. All figures are in billions of dollars. Assume the stock of debt at the end of 2016 is $500 billion. Use the table to answer the questions below. Stock of Year G T iD Debt 2016 250 260 18 500 2017 250 262 18 2018 265 263 20 2019 270 267 21 i. What is the primary budget deficit or surplus in 2018? ii. What is the budget deficit in 2016? iii. What is the primary budget deficit or surplus in 2017? iv. What is the stock of debt at the end of 2017? v. What is the budget deficit in 2019? vi. What is the stock of debt at the end of 2019