What is the average L/100km urban value having an L/100km extraurban under 7.2, mpg combined in the UK under 39.8, l/100km combined over 7.9, and mpg combined in the US under 25.1?
SELECT AVG L/100km Urban (Cold) FROM table WHERE L/100km Extra-Urban < 7.2 AND mpg-UK Combined < 39.8 AND L/100km Combined > 7.9 AND mpg-US Combined < 25.1