Repeat Prob. 9–42 when isentropic processes are used in place of the polytropic processes?

Data From Q#42:

Someone has suggested that the air-standard Otto cycle is more accurate if the two isentropic processes are replaced with polytropic processes with a polytropic exponent n = 1.3. Consider such a cycle when the compression ratio is 8, P₁ = 95 kPa, T₁ = 15°C, and the maximum cycle temperature is 1200°C. Determine the heat transferred to and rejected from this cycle, as well as the cycle’s thermal efficiency. Use constant specific heats at room temperature.