Can someone help me, i’m stuck on the pink box

Briefly describe the roles/parts played by trumpet, clarinet, and trombone in new orleans-style collective improvisation, and explain why this type of collective improvisation is fundamentally different from what happens when a typical modern jazz group improvises together.

Which factor contributed to the rise of african empires such as ghana and mali?

The following force measurements were taken during actual testing of the lever pictured. what is the ama of this lever?