CREATE TABLE table_70742 ("Year" FLOAT, "Chassis" TEXT, "Engine" TEXT, "Tyres" TEXT, "Points" FLOAT)

What are the lowest points that have a Mugen V8 engine and a Reynard 91D chassis?
SELECT MIN("Points") FROM table_70742 WHERE "Engine" = 'mugen v8' AND "Chassis" = 'reynard 91d'
SELECT MIN("Points") FROM "table_70742" WHERE "Chassis" = 'reynard 91d' AND "Engine" = 'mugen v8'