#8 Determine whether or not the following languages are context-free
(a) L= { anwwRan : n>=0 , w ∈ {a,b}* }
(b) L = { anbjanbj : n>=0, j>=0 }
(c) L = { anbjajbn : n>=0, j>=0 }
(d) L= { anbjakbl : n+j<=k+l }
(e) L = { anbjakbl : n<=k, j<=l }
(f) L = { anbncj : n<=j }
(g) L = { w ∈ {a,b,c}* : na(w)=nb(w)=2nc(w) }
My answers are :
(a)CFL
(b)Not CFL
(c)CFL
(d) CFL
(e)Not CFL
(f)Not CFL
(g) Not CFL
Please verify.