A Pelton wheel is to be designed for a shaft power of 11 772 kW under a head of 380 m at a speed of 750 rpm. The overall efficiency is 86 % and the jet diameter is not to exceed one-sixth of the wheel diameter. Take C_{v} = 0.985 and speed ratio = 0.45. Determine (a) the wheel diameter (m), (b) the number of jets and (c) the diameter of the jet (m).