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

### Instruction:
What is the average amount of points when the time (s) is 81.78?

### Inputs:
table_name: table, columns: ['Rider', 'Horse', 'Time ( s )', 'Faults', 'Total time ( s )', 'Points']

### Response:
SELECT AVG Points FROM table WHERE Time ( s ) = 81.78