A 4 cylinder, 4 stroke spark ignition engine is running at 2600rpm. The processes in each cylinder are air-standard Otto cycles. At the beginning of the compression process, state 1, the air is at 14.7 psia, 540 degrees R, and the cylinder volume is 0.009ft^3. The compression ratio is 9 and the max pressure in the cycle is 780 psia. Find:
a. the cycle on P-v and T-s diagrams
b. net work output per cylinder per cycle in Btu
c. thermal efficiency
d. power output of the engine in hp