CREATE TABLE "grand_slam_success" (
  "tournament" text,
  "1968" text,
  "1969" text,
  "1970" text,
  "1971" text,
  "1972" text,
  "1973" text,
  "1974" text,
  "1975" text,
  "1976" text,
  "1977" text,
  "1978" text,
  "1979" text,
  "career_sr" text,
  "career_w_l" text,
  "career_win_pct" text
);

Question: What tournament is listed as A in 1972 and 2R in 1975?
SQL: SELECT "tournament" FROM "grand_slam_success" WHERE "1972"='a' AND "1975"='2r';

Question: What is theW-L of the tournament listed as A for 1976?
SQL: SELECT "career_w_l" FROM "grand_slam_success" WHERE "1976"='a';

Question: What is the listing for the US Open in 1977?
SQL: SELECT "1977" FROM "grand_slam_success" WHERE "tournament"='us open';

Question: What is the career W-L of the tournament that is listed as A in 1968 and 4R in 1974?
SQL: SELECT "career_w_l" FROM "grand_slam_success" WHERE "1968"='a' AND "1974"='4r';