The answer is 4 because you can put it this way 8-4!=4 or you can do it with fingers like☝☝☝☝☝☝☝☝-☝☝☝☝=☝☝☝☝
answer is shaking and causing water to move through it.
explanation is i took the quiz and got it right because if you read step 6 you would find it
