which areas have less than 100 square kilometers in area?
ascension island, tristan da cunha, inaccessible island, nightingale island, gough island
of these, which have less than 30 square miles in area?
inaccessible island, nightingale island, gough island
of the remaining, which ones have no population?
inaccessible island, nightingale island
from the last two, which is administered by west landing?
nightingale island