At what maximum speed can a motorcyclist ride on a horizontal plane, describing a circle of radius R, if the coefficient of friction is equal to µ? What angle should it deviate from the vertical? How many times will the maximum permissible speed of a motorcyclist increase when driving on an inclined track with an angle of inclination α to the horizon compared to the maximum permissible speed when driving on a horizontal track with the same turning radius and the same coefficient of friction?