The following dialog is for questions 4 to 7.

Jack: What is this?

Dina: Oh, this is angklung, a traditional music instrument made from bamboo tubes.

Jack: How does it work?

Dina: You can shake the bamboo from side to side to make a sound different bamboos have different tones.

Jack: Wow! It's interesting. Where does it come from?

Dina: It originates from Indonesia, especially West Java Province. It has been used and played by Sundanese people since a longtime ago.

Jack: Can you play it for me? I want to see how to play it.

Dina: Sure.

To play angklung, you need to ____ the instrument.