Figure 3 shows the T-s diagram of an ideal air-standard gas-turbine (Brayton) cycle fitted with an ideal regenerator: air leaving the compressor (state 2) is heated to state 5 by the turbine exhaust (state 4), which leaves the regenerator at state 6. Take c_{p} = 1.005 kJ/kg·K and γ = 1.4. Determine (a) the compressor exit temperature T_{2} (in K), (b) the heat supplied in the combustion chamber per kg of air (in kJ/kg), and (c) the thermal efficiency of the cycle (in %).