CREATE TABLE table_69295 ("Island" TEXT, "Group" TEXT, "Area  (  ha  ) " TEXT, "Population" TEXT, "Height  ( m ) " FLOAT)

What group on the island of Muckle Green Holm has a population of 0?
SELECT "Group" FROM table_69295 WHERE "Population" = '0' AND "Island" = 'muckle green holm'
SELECT "Group" FROM "table_69295" WHERE "Island" = 'muckle green holm' AND "Population" = '0'