CREATE TABLE table_name_88 (wsu_year_s_ VARCHAR, pro_year_s_ VARCHAR)

What is WSU Year(s), when Pro Year(s) is 1974-77?
SELECT wsu_year_s_ FROM table_name_88 WHERE pro_year_s_ = "1974-77"
SELECT "wsu_year_s_" FROM "table_name_88" WHERE "1974-77" = "pro_year_s_"