Table schema:
CREATE TABLE table_name_75 (set_1 VARCHAR, set_3 VARCHAR, set_2 VARCHAR)

Question: What was the Set 1 game score when Set 3 game score was 15–4, and a Set 2 game score was 15–7?
SQL: SELECT set_1 FROM table_name_75 WHERE set_3 = "15–4" AND set_2 = "15–7"