Thermodynamics. Can someone kindly show me their worked solutions for part (b)

b) Air flows at a steady rate through a horizontal open system from A to B. The air can be treated as a perfect gas with Cp/Cv=1.4 and Cp=1005J/kgK. The gas velocity increases from 20m/s at A to 40m/s at B. The temperature at A is 47C and the pressure ratio PB/PA is 1.2. Calculate the specific work done and the specific heat transfer if the process is: (i) An adiabatic process and the specific enthalpy increases by 500J/kg (ii) A reversible adiabatic process (iii) A reversible polytropic process with a polytropic inde: value of 1.3