Given a sequence of numbers, find the sum and average of all numbers in the sequence.
2, 3, 5, 8
The sum of all numbers in the sequence is 18 and the average is 18/4 = 4.5.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Given a sequence of numbers, find the sum and average of all numbers in the sequence.

### Response:
The sum of all numbers in the sequence is 18 and the average is 18/4 = 4.5.