An air standard dual cycle has a compression ratio of 14 and a cutoff ratio of 12 the pressure ratio during the constant-volume heat addition process is 15 dotormine a) the specific volume of the air at the start and end of the compression, b) the maximum gas pressure and temperature when this cycle is operated at 80 kpa and 20°c at the beginning of the compression. c) the amount of heat added, d) the thermal efficiency use constant specific heats at room temperature