1. A government starts off with a total debt of $3.5 billion. In year one, the government runs a deficit of $400 million. In year two, the government runs a deficit of $1 billion. In year three, the government runs a surplus of $200 million. What is the total debt of the government at the end of year three?

2. If a government runs a budget deficit of $10 billion dollars each year for five years, then a surplus of $1 billion for ten years, and then a balanced budget for another ten years, what is the government debt?