Carbon Dioxide enters a two-stage compressor at 100 kPa and 300C and is compressed to a final pressure of 650 kPa. The pressure ratio across each stage is the same and the Carbon Dioxide is cooled back to the initial temperature between the two stages. Assuming that the compression process is isentropic and the mass flow rate is 0.15 kg/s determine the amount of power saved versus the use of a single compressor. Assume constant properties at 300 K.