 Complete the following phrase:  Brett Yang and Eddy Chen first met in a mathematics tutoring class when Yang was 14 and Chen 13. They became acquainted as the youngest members of a youth orchestra and later as students at Queensland Conservatorium Griffith University in Brisbane, Australia. In 2012, Yang debuted at Queensland Conservatorium performing the Tchaikovsky Violin Concerto. He later worked with various other Australian orchestras, including a performance at the 