Question: Who is the arranger when the vocal percussionist is Alexei Kalveks and Dave Brennan?
Schema: create table table_28715942_5 (arranger_s_ varchar, vocal_percussionist varchar, PRIMARY KEY (arranger_s_))
SQL: select arranger_s_ from table_28715942_5 where vocal_percussionist = "alexei kalveks and dave brennan"