who is the the president with date of inauguration being 4june1979
CREATE TABLE "ghanaian_presidents_ages" (
  "num" real,
  "president" text,
  "date_of_birth" text,
  "date_of_inauguration" text,
  "age_at_inauguration" text,
  "end_of_term" text,
  "length_of_retirement" text,
  "date_of_death" text,
  "lifespan" text
);
SELECT "president" FROM "ghanaian_presidents_ages" WHERE "date_of_inauguration"='4June1979';