Calculate the average temperature for the four days.
Day 1: 15 degrees
Day 2: 25 degrees
Day 3: 20 degrees
Day 4: 10 degrees
The average temperature for the four days is 17.5 degrees.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Calculate the average temperature for the four days.

### Response:
The average temperature for the four days is 17.5 degrees.