Note: Each month, KPLU invites a teen guest DJ to play his or her favorite pieces on the air. The program is part of KPLU's School of Jazz . Brad Bjorn from Tahoma High School is the Student DJ for the month of August. Brad's hour aired from 8 to 9 p.m. on August 4th. To get to know him better, we asked Brad to answer a few questions about jazz: Which instrument do you play and why?