CREATE TABLE table_77578 ("Entrant" TEXT, "Constructor" TEXT, "Chassis" TEXT, "Engine \\u2020" TEXT, "Tyre" TEXT, "Driver" TEXT, "Rounds" TEXT)

what is the engine when the rounds ar all, the tyre is m and the driver is david coulthard?
SELECT "Engine \u2020" FROM table_77578 WHERE "Rounds" = 'all' AND "Tyre" = 'm' AND "Driver" = 'david coulthard'
SELECT "Engine \u2020" FROM "table_77578" WHERE "Driver" = 'david coulthard' AND "Rounds" = 'all' AND "Tyre" = 'm'