The country of bienmundo does not trade with any other country. its gdp is $30 billion. its government purchases $5 billion worth of goods and services each year and collects $6 billion in taxes. private saving in bienmundo amounts to $5 billion. what are consumption and investment in bienmundo? a. $17 billion and $8 billion, respectively. b. $19 billion and $6 billion, respectively. c. $19 billion and $8 billion, respectively. d. $17 billion and $6 billion, respectively.