Table schema:
CREATE TABLE table_name_15 (self_employed VARCHAR, investment_income VARCHAR, other_income_sources VARCHAR, employment___salaries_ VARCHAR, _wages_ VARCHAR)

Question: Investment income of 2%, and an other income sources of 3%, and an employment (salaries & wages) of 71% involves which self employed?
SQL: SELECT self_employed FROM table_name_15 WHERE investment_income = "2%" AND other_income_sources = "3%" AND employment___salaries_ & _wages_ = "71%"