Consider a modification of the air-standard otto cycle in which the isentropic compression and expansion processes are each replaced with polytropic processes having n=1.3. the compression ratio is 9 for the modified cycle. at the beginning of compression, p1=1bar and t1=300k and v1=2270 cm3. the maximum temperature during the cycle is 2000k. determine: (a) the heat transfer and work in kj, for each process in the modified cycle. (b) the thermal efficiency. (c) the mean effective pressure, in bar.