It's 7:50 P.M. Your snowmobile is out of gas and you are 3 miles due south of a major highway. The nearest gas station on the highway is 6 miles east of your position; it closes at 10 P.M. You can walk 4 miles per hour on the roads, but only 3 miles per hour through snow fields. Can you make it before it closes? What is the best route to minimize your time?