Create a PDA for these languages

$5.\{$a$^$i b$^$j c$^$k $|$i$,$ j$,$ k $>=0,$ i $+$ k $=$ j$\}$

$6.\{$a$^$mb$^$nc$^$pa$^$m$|$m$,$ n$,$ p $>=0\}$

$7.\{$a$^$nb$^$m$|$n $<=$ m $<=2$n$,$ m$,$ n $>=0\}$