Final answer:
a) Lilliput's balance of trade for the last calendar year is a trade deficit of -$194 billion, which occurs when a country's imports exceed its exports.
b) Type of trade balance is Lilliput running is a trade deficit.
Step-by-step explanation:
The balance of trade for a country is calculated by subtracting the value of its imports from the value of its exports.
In Lilliput's case, it is given that the country exported goods worth $287 billion and imported $481 billion.
Balance of Trade = Exports - Imports
Balance of Trade = $287 billion - $481 billion
Balance of Trade = -$194 billion
This negative balance indicates that Lilliput imported more than it exported, resulting in a trade deficit.