A Carnot power cycle operates on 1.5 kg of air between the limits of 400 K and 250 K, completing one cycle each second. The pressure at the beginning of adiabatic expansion is 1000 KPa. Determine each of the following: a) Pressure at the end of adiabatic expansion, b) Changes in entropy during the adiabatic process, c) Heat absorbed and heat rejected, d) Power developed, e) Efficiency.