A natural gas stream in a pipeline condenses a 0.05 GPM over a distance of 15 km. If the 15 km pipeline segment is pigged once a day, and the total volume of the condensate removed by the pig is 5 gallons over a total time period of 30 minutes, (a) calculate the volume flow rate of the natural gas stream at the normal condition in cubic meter per hour (ie. Nm³/h) (b) by assuming ideal gas behavior, calculate the actual volume flow rate of the natural gas stream (in m³/h) if the operating temperature and pressure of the segment of the pipeline in question are 25 °C and 10 barg respectively (c) by assuming the speed of the pig is the same as that of the gas and that there is no gas slippage around the pig, determine the internal diameter of the pipeline in millimeter (mm) Data given: 1 GPM 0.141 m³ liquid per 103 Nm³ gas = 1 gallon 0.00454609 m³ Normal condition: Temperature-0 °C and Pressure-1.01325 bar