Final answer:
Due to missing population data for the four islands, an exact calculation using Jefferson's method cannot be provided. The concept pertains to the apportionment of congressional seats based on population, similar to methods used in the U.S. House of Representatives.
Step-by-step explanation:
The student is asking how to apportion congressional seats among four islands using Jefferson's method. This method involves allocating seats in proportion to population but involves a modifier to prioritize giving entire seats to states or units.
However, the actual method and calculations were not included in the question, and there seems to be missing data (the population percentages for each island) to perform an actual apportionment. Therefore, it's important to have the population percentages to proceed with the apportionment calculation using Jefferson's method. Unfortunately, without that data or specific steps for applying Jefferson's method, providing an exact apportionment is not feasible.
Congressional apportionment in the United States today is based on equal proportions method as per the U.S. Census data every ten years, with a fixed number of 435 seats following the Apportionment Act of 1911.
Under Article I, Section 2 of the Constitution, each congressional district represents approximately 700,000 people, except for those states with populations too small to warrant more than one representative. Apportionment ensures that each state is represented accordingly in the House of Representatives.