The amount of heat rejected is

Question

A Carnot engine uses nitrogen as the working fluid ($\gamma$=1.4). The heat supplied is 52 kJ and adiabatic expansion ratio is 32: 1. The receiver temperature is 295 K. The amount of heat rejected is

(a) 11 kJ                      (b) 13 kJ         

(c) 26 kJ                      (d) 28 kJ