CREATE TABLE table_66551 ("Manufacturer" TEXT, "Transmission" TEXT, "Engine Capacity" FLOAT, "Fuel Type" TEXT, "L/100km Urban  ( Cold ) " FLOAT, "L/100km Extra-Urban" FLOAT, "L/100km Combined" FLOAT, "mpg-UK Urban  ( Cold ) " FLOAT, "mpg-UK Extra-Urban" FLOAT, "mpg-UK Combined" FLOAT, "mpg-US Urban" FLOAT, "mpg-US Extra-Urban" FLOAT, "mpg-US Combined" FLOAT, "CO 2 g/km" FLOAT, "Green Rating" TEXT)

What's the engine capacity when the mpg-UK urban is less than 12.2, the mpg-UK extra urban is less than 18.8 and the mpg-US turban is less than 7.2?
SELECT SUM("Engine Capacity") FROM table_66551 WHERE "mpg-UK Urban (Cold)" < '12.2' AND "mpg-UK Extra-Urban" < '18.8' AND "mpg-US Urban" < '7.2'
SELECT SUM("Engine Capacity") FROM "table_66551" WHERE "mpg-UK Extra-Urban" < '18.8' AND "mpg-UK Urban (Cold)" < '12.2' AND "mpg-US Urban" < '7.2'