The intake conditions for an air-standard dual cycle operating with a compression ratio of 15: 1 are 0.95 bars and 17°C. The pressure ratio during constant-volume heating is 1.5 : 1 and the volume ratio during the constant-pressure part of the heating process is 1.8 1. Calculate (a) the temperatures and pressures around the cycle, (b) the heat input and heat rejection, and (c) the thermal efficiency. Use air-table data.