Otto/Diesel Engine Problems

Hi,
I have a problem to solve but i'm having a hard time.
2 Engines (1 Otto and 1 Diesel) work with a 250 KPa load (i think it's load what you call it). The first has the throttle partially closed. The second (diesel) doesn't need the throttle. The mep is 100 kPa. the Intake manifold pressure is 25 kPa e 100 kPa, respectively. Intake manifold pressure is 105 kPa on both of them. Use the cycles to find the mip. Consider the pressure drop has non existing.
Thanks

ps: Sorry for the bad English