Construct npda$$s that accept the following languages:

$\backslash$Sigma $=\{$a$,$b$,$c$\}$:

$($GRADED $4$ points$)$ L$=\{$a$^($n$)$b$^($m$)$c$^($n$+$m$)$:n$>=0,$m$>=0\}$

$($GRADED $4$ points$)$ L$=\{$wCw$^($R$)$:win$\{$a$,$b$\}^(*)\}$