1. A particular economy has consumption of $400M, a government deficit of $100M, taxes of $250M, and income of $800M. Which of the following statements must be true?

1. If investment is zero, there is no foreign trade imbalance.
2. If the trade surplus is $50M, investment will be equal to $100M.
3. If the capital account surplus is $50M, investment will be equal to $100M.
4. If the trade surplus is $100M, there will be investment.
5. None of the above statements is necessarily true.