Table: faroe_islands_municipalities
Columns: municipality
population
inhabitants_per_km
area_in_km
markatal
island
region

Question: What is the average Area (in km²), when Markatal is less than 0?
SQL: SELECT AVG("area_in_km") FROM faroe_islands_municipalities WHERE "markatal" < 0

Question: What is the highest Markatal, when Municipality is Leirvík, and when Inhabitants Per Km² is greater than 79?
SQL: SELECT MAX("markatal") FROM faroe_islands_municipalities WHERE "municipality" = 'leirvík' AND "inhabitants_per_km" > 79

Question: What is the sum of Population, when Markatal is greater than 48, when Inhabitants Per Km² is greater than 24, and when Municipality is Runavík?
SQL: SELECT SUM("population") FROM faroe_islands_municipalities WHERE "markatal" > 48 AND "inhabitants_per_km" > 24 AND "municipality" = 'runavík'

Question: What is the sum of Markatal, when Inhabitants Per Km² is less than 13, and when Area (in Km²) is 27?
SQL: SELECT SUM("markatal") FROM faroe_islands_municipalities WHERE "inhabitants_per_km" < 13 AND "area_in_km" = 27