PHYSICS HELP PLEASE!!!!?

You are driving through an intersection in a 55 mi/hr speed zone, when another car hits you broadside. The two cars stick together and skid a distance 42.1 m with locked wheels at an angle of 67.7�. The m of your car is 1412.0 kg while the other car has a m 2033.0 kg. The coefficent of sliding friction is 0.60. Compute the speed of the other car immediately prior to the collision.