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

### Instruction:
What is the average population vlue for an area smaller than 26.69 square km and has an official name of Rogersville?

### Inputs:
table_name: table, columns: ['Official Name', 'Status', 'Area km 2', 'Population', 'Census Ranking']

### Response:
SELECT AVG Population FROM table WHERE Area km 2 < 26.69 AND Official Name = rogersville