Please choose the correct ending to complete the given sentence: Doing karate: Young boys are shown doing a karate demo in front of the judges. they

Ending1: practice quickly how to execute a martial art using their hands in steps while with their heads lowered. Ending2: use a black belt and a nunchaku. Ending3: practice with swords and perform several different moves. Ending4: move back and forth and front to back performing various punches.

Answer format: ending1/ending2/ending3/ending4