Acompression ignition engine is to be modeled using the ideal air-standard diesel cycle using constant specific heat (use cp = 0.240 [btu/(lbm r) and k = 1.4). this engine has a compression ratio of 20 and 400 [btu/lbm] are added during the heat addition process, and the state 1 temperature and pressure are 100°f and 15 [psia], respectively. calculate a)-the temperature and pressure after compression b)-the temperature and pressure after heat addition c)-the cutoff ratio d)-the thermal efficiency e)-the mean-effective pressure