can you guys help me with part A and B

Suppose that a country has no public debt in year 1 but experiences a budget deficit of $50 billion in year 2 . a budget surplus of $10 billion in year 3 , and a budget deficit of $2 billion in year 4 . Instructions: In part a, enter your answer as a whole number. For the absolute size of the public debt, enter your answer as a positive number in part b, round your answer to 2 decimal places. a. What is the absolute size of its public debt in year 4 ? 5 billion b. If its real GDP in year 4 is $104 billion, what is this country's pubic debt as a percentage of real GDP in year 4 ? percent