Consider an ideal Brayton cycle executed between the pressure limits of 1200 and 100 kPa and temperature

Question:

Consider an ideal Brayton cycle executed between the pressure limits of 1200 and 100 kPa and temperature limits of 20 and 10008C with argon as the working fluid. The net work output of the cycle is
(a) 68 kJ/kg
(b) 93 kJ/kg
(c) 158 kJ/kg
(d) 186 kJ/kg
(e) 310 kJ/kg