What is the mean effective pressure of the cycle?

Question

 In an Otto cycle, air is compressed from 2.2l to 0.26l from an initial pressure of 1.2 kg/cm².  The net output/ cycle is 440 kJ.  What is the mean effective pressure of the cycle?

(a) 227 kPa            (b) 207 kPa

(c) 192 kPa            (d) 185 kPa