The shaft in Figure 3 runs at 960 rpm in two deep-groove ball bearings A and B and carries a spur gear that applies a radial load of 8 kN at the position shown. Bearing A has a dynamic load rating C = 35.1 kN. Taking the rating life L_{10} = (C/P)³ million revolutions (pure radial load, so P = radial reaction), determine (a) the radial load on bearing A (in kN), (b) the rating life of bearing A (in hours) and (c) the dynamic load rating required for bearing B if it must have a rating life of 12 000 hours (in kN).