CREATE TABLE table_16224 ("Week" FLOAT, "Opponent" TEXT, "Result" TEXT, "Stadium" TEXT, "Record" TEXT, "Attendance" FLOAT)

What week corresponds to the last one to be played at the memorial stadium?
SELECT MAX("Week") FROM table_16224 WHERE "Stadium" = 'Memorial Stadium'
SELECT MAX("Week") FROM "table_16224" WHERE "Stadium" = 'Memorial Stadium'