What is the highest amount of extra points someone got when they scored 28 points but had 0 field goals?
CREATE TABLE "michigan_28_wisconsin_0" (
  "player" text,
  "touchdowns" real,
  "extra_points" real,
  "field_goals" real,
  "points" real
);
SELECT MAX("extra_points") FROM "michigan_28_wisconsin_0" WHERE "points"=28 AND "field_goals"<0;