Question: Construct a Context - Free Grammar for the language { ( a b ) n c ( b a ) n d | n 0

Construct a Context-Free Grammar for the language {(ab)nc(ba)nd|n0}. The alphabet is {a,b,c,d}.
Design a Pushdown Automaton (PDA) for the language {(ab)nc(ba)nd|n0}. Use X for the initial symbol on the stack, and accept by final state. The alphabet is {a,b,c,d}.
Construct a Context-Free Grammar for the language {abx+1acxdyay+1|x,y>0}. The alphabet is {a,b,c,d}.
Design a Pushdown Automaton (PDA) for the language {abx+1acxdyay+1|x,y>0}. Use X for the initial symbol on the stack, and accept by final state. The alphabet is {a,b,c,d}.
Construct a Context - Free Grammar for the

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