A$)$ How could ${?}^{13}C$ NMR$,{?}^{1}H$ NMR$,$ and IR spectroscopy be used to distinguish between the following pair of compounds?

B$)$ How could ${?}^{13}C$ NMR$,{?}^{1}H$ NMR$,$ and IR spectroscopy be used to distinguish between the following pair of compounds?

$\backslash$table$[[,$Distinguishing peaks either in ppm or cm$-1],{[}^{13}CMR,],[\backslash$table$[[$NMR$],[$NMR$]],],[$IR$,]]$