Need Help Solving Physics Problem Please?

Its an icy day. and a car (m=1000kg) has skidded off the road down a 25 degree embankment. To make matters worse, the cars brakes have locked up, so the wheels cant turn. A tow truck (m=8000kg) has come along to pull the car out, but the road is still icy. There is a pulley system (ume frictionless) availible that allows the truck to pull sideways, while the chain (of negligible) attached to the car pulls parallel up the embankment. If the coefficient of kinetic friction on the embankment is 0.25, what is the minimum coefficient of static friction between the icy road and the tow truck that will allow the tow truck to pull the car out of the embankment? Dont worry about the static friction that would need to be overcome to get the car moving.