An ideal Otto cycle has a compression ratio of 9.2 and uses air as the working fluid. At the beginning of the compression process, air is at 98 kPa and 27°C. The pressure is doubled during the constant-volume heat-addition process. Accounting for the variation of specific heats with temperature, determine
(a) The amount of heat transferred to the air,
(b) The net work output,
(c) The thermal efficiency, and
(d) The mean effective pressure for the cycle.