A four cylinder, four-stroke 3-L (maximum volume per cylinder) diesel engine that operates at 1500 rpm on an ideal Diesel cycle has a compression ratio of 18 and a cutoff ratio of 3. Air is at 25oC and 100 kPa (atmospheric conditions) at the beginning of the compression process. Assume heat addition takes place from a reservoir at 2600oC and heat rejection to the atmosphere. Using the PG model, (a) perform a complete energy inventory and draw the energy flow diagram on a rate (kW) basis. Determine (b) the overall energetic efficiency and (c) the thermal (energetic) efficiency (ηth) of the cycle.