$(14$ points$)$ Consider the language:

L$1=\{01$a$0$a$1|$a$>=0\}$

where a is an integer and $\backslash$Sigma $=\{0,1\}.$ Is L$1$ in REG? Circle the appropriate answer and justify your$$answer$.$

$2.(14$ points$)$ Consider the language:

YES or NO