A cold air-standard Otto cycle has a compression ratio of 12 and the temperature and pressure at the beginning of the compressionprocess are 520°R and 14.2 lbf/in., respasttively. The heat

addition per unit mass of air is 500 Btu/lb. Assume constant specific heatsevaluted at 520°R. (a) the maximum temperature, in °R. (b) the maximum pressure, in Ibf/in.- (c) the percent thermal efficiency. (d) the mean effective pressure, in Ibf/in.-