 Complete the following phrase:  Ferrari retained Lauda and Regazzonis services for 1975 and the pair took six victories between them: five for Lauda, and one for Regazzoni at the 1975 Italian Grand Prix. Regazzoni also won his home Grand Prix, the non-championship Swiss Grand Prix, the only Swiss driver to have done so. Ferrari secured the Constructors Championship, and Lauda won the first of his three World titles. Regazzoni finished fifth in the Drivers Championship with 39.5 points, the half-point coming at the 