One mole of a monatomic ideal gas has an initial pressure of $210 \mathrm{kPa},$ an initial volume of $1.2 \times 10^{-3} \mathrm{m}^{3}$, and an initial temperature of $350 \mathrm{K}$. The gas now undergoes three separate processes: (i) a constant-temperature expansion that triples its volume; (ii) a constant-pressure compression to its initial volume; and (iii) a constant-volume increase in pressure to its initial pressure. At the end of these three processes, the gas is back at its initial pressure, volume, and temperature. Plot these processes on a pressure-versus-volume graph, showing the values of $P$ and $V$ at the end points of each process.