An air-standard dual cycle has a compression ratio of 10. At the beginning of compression, p₁ = 100 kPa, T₁ = 298 K and V₁ = 12 L. and The heat addition is 20 kJ, with one half added at constant volume and one half added at constant pressure. Determine (a) the temperatures at the end of each heat addition process, in K. (b) the net work of the cycle per unit mass of air, in kJ/kg. (c) the thermal efficiency. (d) the mean effective pressure, in kPa.