A $12 \mathrm{in}$. ID natural gas (methane) pipeline carries gas at a rate of $20,000 \mathrm{scfm}$. The compressor stations are 100 miles apart, and the discharge pressure of the compressors is 500 psia. If the temperature of the surroundings is $70^{\circ} \mathrm{F}$, what is the required horsepower of each compressor station, assuming 65% efficiency? If the pipeline breaks 10 miles downstream of a compressor station, what will be the flow rate through the broken pipe?