please also give explanations step by step

Total 25 STION 3 A compressible gas is transported to a 40 km distance from the production plant through a 0.5 m ID commercial steel pipe at a rate of 13 000 g/s. The supply pressure from the plant is 11x10 Pa. Consider the flow of the gas to be isothermal at 288 K and that the pipe is horizontal. The molecular mass of the gas is 16 kg/kmol, R = 8.314 J/mol K and viscosity is 1.03x10- Pa.s. Calculate the delivery pressure of the gas. You may perform two iterations only. (25)