Please choose the correct ending to complete the given sentence: Windsurfing: Woman is in a lake windsurfing with a red windsurf. other people

Ending1: are in windsurfing smore surfing in the lake. Ending2: are in sitting on decanters in the water. Ending3: are in a boat doing sail in a lake. Ending4: are in the back windsurfing in the lake.

Answer format: ending1/ending2/ending3/ending4