CREATE TABLE table_70596 ("Year" FLOAT, "Entrant" TEXT, "Chassis" TEXT, "Engine" TEXT, "Points" FLOAT)

What is the average number of points for an Offenhauser L4 engine with a Trevis chassis?
SELECT AVG("Points") FROM table_70596 WHERE "Engine" = 'offenhauser l4' AND "Chassis" = 'trevis'
SELECT AVG("Points") FROM "table_70596" WHERE "Chassis" = 'trevis' AND "Engine" = 'offenhauser l4'