Air with the mass of 50 gram experienced mechanically reversible 1. processes in a closed system. the initial state is 1 bar and 50°c. in the first process, air is compressed adiabatically, followed by cooling at constant volume to 5 bar and 60°c. these processes were then replaced by constant volume followed by constant pressure to 5 bar and 60°c from initial condition of 1 bar and 50°c. heat capacity at constant pressure cp-(7/2)r and heat capacity at constant volume cy-(/2)r. a. calculate the heat transferred (j), work (j), and change in internal enersy (j) for each process [10 marks] b. calculate the change in enthalpy (j) for each process. [3 marks] sketch the processes on a single pressure-volume (p-v) diagram and label the position of each volume and pressure. [4 marks] d. if the processes were irreversible with efficiency of 85%, determine v the real work (j) and heat transferred (j).