We graphically determined the area associated with each cloud population, finding area to be $\mathrm{99.07~kpc^2}$ for the spiral arms, $\mathrm{106.47~kpc^2}$ for the inter-arm region, and $\mathrm{4.21~kpc^2}$ for the nuclear region. Fig.~\ref{norm_mass} shows the mass distributions with the number of clouds in each population normalized by their respective areas, denoted by $N_\mathrm{norm}$. While the nuclear distribution maintains its flat shape with a steep drop at its bulk of $10^8 M_\odot$ clouds, we also see that the nuclear clouds have higher number density and characteristic masses than disk clouds. The arm and inter-arm distributions are also clearly different from one another, with the inter-arm clouds having a lower average number density and a steeper mass distribution than arm clouds. The inter-arm region, therefore, carries more of its mass in lower mass stars compared to the spiral arms.
