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Assuming uniform circular motion, my questions are

1. Is the static friction of each wheel points toward the center of turning circle or it's the combined forces of all four wheels that has to point toward the center of turning circle from the center of mass of the car?

2. Would the total moment of frictional force of all four wheels with respect to the center of mass be zero (no net torque so no angular acceleration)?

3. Is there any condition for the relative values between each frictional force e.g. the frictional forces of the two rear wheels have to be the same or the frictional forces of the inner (front/rear) wheel are always higher than those of the outer (front/rear) wheel?

Many thanks in advance.