1. we examined five Important accounts related to International Trade: The Current the Account;the Capital Account; the Balance of Trade (BOT); Net Investment Income; and the Balance of Payments. Four of these five accounts can be, and always are out of balance, with significant deficits or surpluses. One of the five MUST be, and always-is closely in balance every year. Which account is that?

2.How it the balance if trade(BOT) defined?(The equation is simple,but make sure your answer is sufficiently specific!)There are only two elements is five words long,one word is not enough.)