An equimolar mixture of methane + and n-butane at 50°C and 1 bar in compressed to 25 bar in a compressor that has an isentropic efficiency of 0.72, is cooled back down to 50°C, and then undergoes a Joule-Thompson expansion to 2 bar. Determine the temperature of the stream leaving the compressor, of the streams exiting the valve, the relative amounts of the vapor and liquid from the valve, and the compositions of each.