A car drives about an unbanked curve at a constant speed of around 60 mph. Suspending from the rear view mirror of the car is an object on the string. As the car goes about the curve, the object suspends at an angle of 25 degrees with respect to the vertical. Determine the radius of the curve of the road? When the car is moving at max speed possible devoid of slipping, determine the coefficient of static friction among the road and tires of the car?