Suppose a country has no public debt in year 1 but experiences a budget deficiet of $40 billion in year 2 , a budget deficiet of $ 20 Billion in year 3 a surplus of $10 billion in year 3 and a budget deficiet of $2 billion in year 4. What is the absolute size of its public debt in year 4? if its real GDP in year 4 is $104 billion, what is the country's public debt as a percentage of real GDP in year 4.