Use the pumping lemma to demonstrate that L$\_2$ is not regular. $($b$)$ L$\_2=\{$w in $\{$a$,$ b$,$ c$\}^*$: a$^$i b$^$jc$^$k$+2.$ where i$=$k and $.$i$,$ j$,$ k $>=0\}(5$ points$)$