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

### Instruction:
What was the highest average when Fuml was 0?

### Inputs:
table_name: table, columns: ['Player', 'Att.', 'Yards', 'Avg.', 'Long', 'FumL']

### Response:
SELECT MAX Avg. FROM table WHERE FumL < 0