An ideal Stirling cycle operates between thermal energy reservoirs of 627C and 7C while producing 500kW of power. Determine (i) Thermal efficiency. (2 marks) (ii) Heat addition to the cycle. (2 marks) (iii) Net work per cycle when it is repeated at 2000 times per minute. (2 marks) (iv) Power output when it is repeated at 3000 times per minute. (2 marks)