Please choose the correct ending to complete the given sentence: Tai chi: Two people are demonstrating tai chi. There is a garden with colorful flowers shown outside the tai chi school building. the instructors wearing blue robes

Ending1: are demonstrating tai chi in an outdoor area. Ending2: speak to one another. Ending3: appear to help. Ending4: are showing the basic moves used in tai chi.

Answer format: ending1/ending2/ending3/ending4