please finish this with all the steps

22. Water at 60F is forced by compressed air from a large accumulator, whose level is kept constant by means of a pressurized main and float valve assembly, through the 21/2-in schedule 80 cast iron piping system shown below. (a) Calculate the equivalent length of the piping system. (b) Calculate the flow rate [in gal(US) min1] when the air pressure is 45psig. (c) What size pump (horsepower) would be needed to replace the accumulator [Taken from the 1995 Final Exam]