Please choose the correct ending to complete the given sentence: Waterskiing: Scientist writes a formula on a board, then the scientists run and jumps in the water. Then, people water ski in the water pulling by a boat. a woman water ski

Ending1: while two men explains the movements made by the girl. Ending2: under thesand the boat pass a boat in the water. Ending3: and jumps underneath the boat. Ending4: in a lake that has waterfalls.

Answer format: ending1/ending2/ending3/ending4