The lost head through a 2"-diameter orifice under a certain head is 0.540 ft, and the velocity of the water in the jet is 22.5 ft/sec. If the coefficient of discharge is 0.61, determine the head...

The lost head through a 2"-diameter orifice under a certain head is 0.540 ft, and the velocity of the water in the jet is 22.5 ft/sec. If the coefficient of discharge is 0.61, determine the head causing flow, the diameter of the jet, and the coefficient of velocity. What size standard orifice is required to discharge 0.016 m 3 /s of water under a head of 8.69 m?