CREATE TABLE table_77915 ("Year" FLOAT, "Network" TEXT, "Play-by-play" TEXT, "Colour commentator ( s ) " TEXT, "Studio host" TEXT)

Were the color commentators who worked with Bill Hewitt doing the play-by-play?
SELECT "Colour commentator(s)" FROM table_77915 WHERE "Play-by-play" = 'bill hewitt'
SELECT "Colour commentator(s)" FROM "table_77915" WHERE "Play-by-play" = 'bill hewitt'