CREATE TABLE table_28532 ("Rd." FLOAT, "Grand Prix" TEXT, "Pole position" TEXT, "Fastest lap" TEXT, "Winning driver" TEXT, "Winning constructor" TEXT, "Report" TEXT)

How many winning constructor catagories are there when Mark Webber had the fastest lap?
SELECT COUNT("Winning constructor") FROM table_28532 WHERE "Fastest lap" = 'Mark Webber'
SELECT COUNT("Winning constructor") FROM "table_28532" WHERE "Fastest lap" = 'Mark Webber'