An ideal gas is undergoing a series of three operations. In the first step, the gas isheated in an isochoric process from $300$ K and $1$ bar to a pressure of $2$ bar. Then, it isexpanded in a reversible adiabatic process to a pressure of $1$ bar. It is cooled atconstant pressure of $1$ bar to $300$ K$.($i$)$ Represent the processes in a PV diagram.