Find the minimum speed at which a car can travel aound this curve w/o skidding if coeff/static fric is 0.5.?

A curve of radius 20 m is banked so that a 1060 kg car traveling at 40 km.h can round it even if the road is so icy that the coefficent of static friction is approximately zero. Acceleration of gravity is 9.81 m/s^2