( 6 points) An ideal Diesel cycle operates with a compression ratio of 14 and a cutoff ratio of 2.8 . At the beginning of the compression process, the air is at 15 psia and 41F. Accounting for variable specific heats with temperature, determine: the maximum temperature during the cycle F the maximum pressure during the cycle psia the specific net work output Btu/lbm the mean effective pressure (MEP) for the cycle psia the thermal efficiency % What is the thermal efficiency of this Diesel cycle if the cold-air standard assumption is used? %