Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
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?

### Inputs:
table_name: table, columns: ['Municipality', 'Population', 'Inhabitants per km²', 'Area (in km²)', 'Markatal', 'Island', 'Region']

### Response:
SELECT SUM Population FROM table WHERE Markatal > 48 AND Inhabitants per km² > 24 AND Municipality = runavík