In an air-standard Brayton cycle air enters the compressor at 1 bar and 25 °C; pressure ratio 8; maximum temperature 750 °C. Find the heat added per kg (answer in kJ/kg) and the cycle efficiency (answer in %). Take c_{v} = 0.718 kJ/kg·K and γ = 1.4. Take R = 0.287 kJ/kg·K.