How do you start up stage 4 on questionaut

Take the dangling key at the left side and unlock the first drawer. Open the drawer and a football (soccer ball) will come out of the drawer.
The fisherman will stop fishing, go down and kick the ball. Grab the key where he was sitting and open the second drawer.
In the second drawer is a box. Click the box to get the third key. Open the third drawer and a glass of red juice will come out of the drawer.
The fisherman will stand up and go down and drink the juice with a straw. Click on him and answer his questions.