Air enters a multistage compressor of a jet engine at 50 kPa and 270 K with a flow rate of 40 kg/s. The compressor has an overall pressure ratio of 20:1. Determine the power required to drive the compressor and the temperature of the air at the compressor outlet. Use the following specific heat at the average temperature: c̅_p = 1.021 kJ/kg·K.