The following data was taken using DEPT NMR$.$ Name each compound.

a$.C_5{H}_{10}$

$\backslash$table$[{[}^{13}C,$DEPT$],[147\mathrm{.}7,-],[108\mathrm{.}3,$down$],[30\mathrm{.}56,$down$],[22\mathrm{.}47,$up$],[12\mathrm{.}23,$up$]]$

b$.C_5{H}_{11}Br$

$\backslash$table$[{[}^{13}C,$DEPT$],[49\mathrm{.}02,$down$],[33\mathrm{.}15,-],[28\mathrm{.}72,$up$]]$

Identify the compound responsible for the following data

IR

IVIs $($iviviecular ion $-121)$

${?}^{13}$ C$-$NMR $(8)$: $40\mathrm{.}50($up$),112\mathrm{.}67($up$),116\mathrm{.}65($up$),129\mathrm{.}03($up$),150\mathrm{.}68(--)$

${?}^{1}H-NMR()$:$2\mathrm{.}891($s$,6$H$),6\mathrm{.}61-6\mathrm{.}82($m$,3$H$),7\mathrm{.}21($m$,2$H$)$