CREATE TABLE table_7789 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Ground" TEXT, "Crowd" FLOAT, "Date" TEXT)

What is the lowest crowd of the west coast home team?
SELECT MIN("Crowd") FROM table_7789 WHERE "Home team" = 'west coast'
SELECT MIN("Crowd") FROM "table_7789" WHERE "Home team" = 'west coast'